Months after the conclusion of the VF Circuit, Aichi enters high school as a freshman at Miyaji Academy. However, he has trouble adjusting to his new school life due to the academy's heavy emphasis on studies. After school, Aichi goes to Card Capital while being tailed by a classmate, Naoki Ishida. There, he sees the many customers playing Vanguard, which Naoki has no knowledge about. He spots Aichi conversing with Team SIT Genius in the back of the shop. Curious by how different Aichi's behavior is in the card shop compared to how he acts at school because of a card game, Naoki becomes intrigued to Vanguard. And so, Aichi teaches Naoki about Vanguard through playing an actual match, with the latter being lent a new Narukami trial deck to use from Shin. As they cardfight, Naoki slowly gets immersed into the game. After Aichi eventually wins, Naoki buys the trial deck and hastily leaves in a frustrated manner, which worries Aichi. But he is later comforted by Kai who tells him that Naoki has in fact taken an interest in Vanguard. The next day at school, Aichi is shocked when his class gets a new transfer student: Kourin Tatsunagi from Ultra Rare.

The news of Kourin transferring into Aichi's class becomes a hot topic, especially when the male classmates start talking to Aichi to get closer to her once they learn that the two know each other. Then, Aichi gets an idea on how to promote Vanguard at his school. Because there is no Cardfight Club, Aichi decides to make one himself. The next day, he tries to recruit enough members to officially start the club (needing a minimum of five people, including himself) by handing out leaflets in front of the school. His pleas fall on deaf ears until Kourin agrees to be a member. Her enlistment is followed by several other boys who want to join (only to be with Kourin), but she proposes that anybody who wants to become club members will have to defeat either her and Aichi in cardfights before they can enter. The two easily beat all of the challengers, but then Naoki steps up to play against Kourin with honest feelings of wanting to join the club. With a new Jewel Knight Royal Paladin deck, Kourin battles Naoki, who uses the Eradicator Narukami trial deck he bought a while ago. In the middle of the fight, Naoki reveals that he knew Aichi from when he was in the elementary school division of Miyaji Academy and how he felt guilty for not doing anything to help Aichi who was being bullied at the time. Naoki further explains that seeing how much Aichi has changed because of Vanguard motivated him to find something to be passionate about and ultimately change himself. In the end, Naoki defeats Kourin with the Break Ride ability of Eradicator, Vowing Sword Dragon. With that, Naoki is initiated into the newly-formed Cardfight Club, and Aichi's life in high school truly begins.

Aichi's Cardfight Club is attracting attention all around the school as male classmates (who are mostly interested in being with Kourin) have him teach them the rules of Vanguard and again attempt to play against Kourin in order to be inducted to the club but to no avail. Additionally, the female students gossip about a rumor that claims Aichi only started the club to get close to Kourin, which makes Misaki worry. Aichi tries to ask Misaki to join the club, but she declines because of her job at Card Capital. Kourin gets an unsettling feeling that there is someone watching her, with Naoki suspecting that it could be a stalker. Naoki eventually confronts the stalker who turns out to be a classmate, Shingo Komoi. Naoki threatens to beat him up, but Shingo suggests to settle things with a cardfight instead. Despite modifying his Narukami deck, Naoki's inexperience at Vanguard causes him to struggle against Shingo's Murakumo deck. After some taunting from Shingo, he reveals that the one who he has been watching is not Kourin, but it is actually Aichi, who he highly admires. Shingo defeats Naoki, who recommends for him to become a member of the Cardfight Club. Aichi and Kourin let Shingo join, thus bringing the total members to four. Unbeknownst to Aichi and his friends, another student observes them from afar and then walks away with the intention of reporting the Cardfight Club's disruptive behavior to the student council president...

The student council president of the Miyaji Academy High School Division deems Aichi's Cardfight Club to be unnecessary for the school and orders the vice president, Suwabe, to devise on how to abolish it. Elsewhere, the Cardfight Club finds an empty classroom to serve its official headquarters. Then, the school's American football team, the Miyaji Vipers, barges in and takes the club outside to the academy's sub-ground where the Vipers' quarterback/captain, Ikki "the Catapult" Kongou, challenges Aichi to a cardfight, with the former appropriately using a Spike Brothers deck. This is an elaborate plan set up by Suwabe to have Ikki defeat Aichi and thereby crush the Cardfight Club members' spirits into not wanting to continue the club. Ikki uses strong Limit Break effects of the latest Spike Brothers to push for victory, but Aichi successfully defends and makes it to his next turn. Aichi then utilizes both the Break Ride of Solitary Liberator, Gancelot and the Limit Break of Liberator of the Round Table, Alfred to overpower and beat Ikki. This loss causes the football team's female cheerleaders to dump Ikki and the Vipers, which devastates them. Later, Naoki asks Ikki's motive for challenging the Cardfight Club, to which he answers that while he was bribed by the student council with a bigger budget for the football team, he mainly did it for the sake of playing against a strong cardfighter like Aichi. The Vipers then take their leave, and the Cardfight Club is more motivated to find a fifth member to have the club become official before the student council acts again.

After Aichi tells his friends at Card Capital about how his school's student council is causing problems for the Cardfight Club, he repeatedly requests for Misaki to join as the fifth member. However, she still turns him down, having mixed feelings on the matter and being insulted by Kourin for not being serious on becoming a member. Then, to quickly shut down of the Cardfight Club, the student council creates a deadline for all potential clubs with at least five members to report to the council, or else they will not be officially recognized by the school. At the last second, Misaki declares herself as the Cardfight Club's fifth member after resolving her feelings of earnestly wanting to join the club. As an initiation test and to prove herself to Kourin, Misaki cardfights Aichi. With her new Genesis deck, Misaki uses the Limit Break abilities of both Eternal Goddess, Iwanagahime and Battle Deity of the Night, Artemis to eventually defeat Aichi and becomes a proper member of the Cardfight Club. However, when Aichi and his friends go to the student council to gain official status, the council denies them because the club does not have a faculty advisor. Nonetheless, the student council president proposes another method for the club to be recognized: produce results by winning against other high schools' cardfighting teams. Aichi agrees to the terms, and so the president arranges for the Cardfight Club's first opposing team, which has familiar-looking members...

Miyaji Academy's unofficial Cardfight Club is set up to have an intramural match against Hitsue High School's Vanguard Club, in which Kai, Miwa, Morikawa, and Izaki are members. The two teams play in a best-of-5 match, and opponents are randomly selected. Under the conditions that the Miyaji Academy student council president created, if the Cardfight Club loses this match, then it will be dissolved. In the first game, Naoki fights Kai, with both using Eradicator-themed Narukami decks. Naoki combines both the Break Ride of Eradicator, Vowing Sword Dragon and the Limit Break of Eradicator, Gauntlet Buster Dragon to retire Kai's units and gain more critical value and power, but Kai manages to survive the assault. Then, Kai uses a similar devastating combo with Vowing Sword and Eradicator, Dragonic Descendant. Although Naoki blocks his first attempt, Kai activates Descendant's Limit Break to have it stand up, gain another critical, and attack again. Unable to defend this attack, Naoki loses, thus putting Hitsue High up 1-0. For the next fight, Kourin is chosen to battle Izaki (which leaves Morikawa extremely envious).

Kourin defeats Izaki, which ties the score 1-1. The third game pits Misaki against Hitsue Vanguard Club's ringer and old Q4 teammate, Kamui Katsuragi. Although Kamui gets an early lead, Misaki mounts a comeback with Battle Deity of the Night, Artemis. Kamui then combines the Break Ride of Beast Deity, Ethics Buster and the Limit Break of Ultra Beast Deity, Illuminal Dragon to stand four of his rear-guards to launch multiple attacks in one turn. However, Misaki protects herself, only taking one point of damage from Kamui's five attacks. In what seems to be a hopeless situation, Misaki rides Eternal Goddess, Iwanagahime and uses its Limit Break to retire Kamui's front-row units. Weakening Kamui's defenses, Misaki wins and puts Miyaji Academy up 2-1. In the fourth game, Shingo is selected to fight against Miwa. Before the fight, Shingo underestimates Miwa, which ends up being his undoing when Miwa demolishes him and evens the score 2-2. So, it's Aichi vs. Morikawa in the fifth and final game that will decide the fate of the Miyaji Academy Cardfight Club. Given Morikawa's reputation, Misaki thinks that this will be an easy win for Aichi. However, after the two fighters reveal their first vanguards, Aichi is surprised to see Morikawa using Kai's Kagero deck (although Morikawa is not particularly glad about this).

Aichi faces Morikawa in the last fight of this intramural match. Although initially mad with using Kai's Kagero deck and not his own, Morikawa nonetheless puts a great amount of pressure on Aichi. All the while, Kai watches the fight as an opportunity to see if his Kagero deck is strong enough against the current Aichi, who strikes back with the Break Ride of Solitary Liberator, Gancelot to empower itself and his rear-guards. Morikawa defends and makes it to his next turn, in which he rides Dragonic Overlord the End. Pairing its Personablast with the Break Ride effect of Dauntless Drive Dragon, Morikawa attacks Aichi with the End three times in a row. Determined to win for the sake of the Cardfight Club, Aichi withstands the onslaught and then uses Gancelot's Break Ride again on the following turn to land a final blow. Aichi emerges victorious over Morikawa, meaning that the Miyaji Academy Cardfight Club wins the intramural match. Aichi and his friends are then congratulated by Hitsue Vanguard Club, with Kai coming to the conclusion that Aichi has indeed grown stronger, perhaps moreso than himself. In spite of being irritated by the Cardfight Club's victory, the Miyaji student council president allows the club to become official and also provides the club with a faculty advisor: Mr. Nakamurabashi, who is clueless about Vanguard. Nevertheless, now that the Cardfight Club has been made official, Aichi and his fellow members look forward to what the future holds for the club.

Now that the Cardfight Club has become official, the new faculty advisor Nakamurabashi makes the club decide on a captain and vice-captain for the club by order of the student council president. Since Aichi was the person who started the club, he reluctantly accepts the position of captain. As for who should be the vice-captain, Shingo is the only person who honestly wants the job while the others are apathetic on the matter. Not wanting to make a hasty decision, Nakamurabashi recommends to hold off until tomorrow on who to elect for vice-captain. After school, Misaki is convinced by her friend Akari to try out for vice-captain. The same happens with Kourin being persuaded by Takuto. The club meets the next day, and when Nakamurabashi asks again for who wants to be the vice-captain, Shingo, Naoki, Misaki, and Kourin all raise their hands. To finally settle things, the four cardfight each other with the overall winner becoming the vice-captain. Misaki defeats Shingo, but Naoki suffers a terrible loss against Kourin. Before the final faceoff between the two girls, Naoki expresses his frustration by saying how bad he feels after finding a passion in Vanguard and yet not initially caring for becoming vice-captain of the Cardfight Club. However, he soon gets over his mortification with a smile. Noticing Naoki's enthusiasm, Misaki, Kourin, and Shingo (much to his chagrin) agree to have Naoki be the vice-captain. As the club walks home from school, Naoki impulsively runs towards a riverside, followed by Aichi and Shingo, where Naoki and Shingo scuffle a bit in the river before all the boys let out one big yell at the sunset.

Shingo tells Naoki about a Cardfight Circle formed in the middle school division of Miyaji Academy. Shingo suggests that the two of them should pay a visit to the circle and build a relationship between it and the Cardfight Club. Naoki agrees, but he is unaware of Shingo's scheme; he plans to use this as his chance to impress the underclassmen and take them under his wing, thereby raising his status over Naoki. The two go to the Cardfight Circle's clubroom where they meet Emi and Mai, who are two of the three members of the circle. Naoki and Mai play a friendly match, in which Naoki shockingly loses to Mai's Bermuda Triangle deck. After the game, he asks her for advice in a somewhat intimidating fashion. But this earns him to be reprimanded by Misaki, who later enters with Aichi. Not knowing that Aichi and Emi are siblings, Shingo gets offended when he hears Emi talking to Aichi in a casual manner, which causes her to get mad with Shingo. This leads to a cardfight pitting Emi, using a PR♥ISM-themed Bermuda Triangle deck, against Shingo, who is using a Narukami deck this time. Although Shingo deals 5 damage to her, Emi nonetheless uses the Break Ride of PR♥ISM-Image, Vert to empower her vanguard PR♥ISM-Promise, Labrador and then returns three of her rear-guards to her hand. She then activates the Limit Break of Labrador to call three rear-guards from her hand to the field, which gives Labrador more power and critical value. Along with getting a critical trigger, Emi thoroughly defeats Shingo. Just as he requests for Aichi to avenge him, Ultra Rare's Rekka Tatsunagi appears in a Miyaji Academy uniform.

Rekka, the third member of Miyaji middle school's Cardfight Circle, enters the clubroom and is followed by Kourin. After Shingo informs Naoki on who Rekka is, she then challenges Aichi to a Vanguard fight. As the two battle, Rekka shows off her charm as an idol, which infatuates Shingo into becoming her fan. Rekka uses the various effects of her Celestial-themed Angel Feather deck to move cards in and out of her damage zone to her advantage. She gets a copy of Solidify Celestial, Zerachiel into her damage zone which, via the Limit Break of her vanguard Zerachiel, empowers all of her Celestial Angel Feather units. However, Aichi withstands Rekka's assault and uses his Gancelot/Alfred Limit Break Ride combo while also superior calling Blaster Blade Liberator from the soul to finish the game and defeat her. Afterwards, the two clubs give their thanks to each other before Shingo offers to become a member of Rekka's fan club.

The Cardfight Club receives an invitation to and then registers for the upcoming Vanguard Fight High School Championship, a tournament that will feature high school Vanguard teams from all over Japan. Naoki suggests to check out some of the competition, which leads to the club visiting Fukuhara High, an elite private high school that is associated with Team Asteroid. The club is greeted by Tetsu Shinjou, who leads everyone into the school where they watch a cardfight between Asaka Narumi and Leon Soryu, much to Aichi's surprise. Asaka tries to end the game by using Starlight Melody Tamer, Farah's Personablast and the Pale Moon strategy of superior calling units from the soul during the battle phase for additional attacks. Despite the multi-pronged assault, Leon defends himself and then rides Last Card, Revonn on top of Blue Flight Dragon, Trans-core Dragon. This activates the latter's Break Ride effect, forcing Asaka to discard a card from her hand. He then utilizes the Limit Break of Revonn to gain more power and critical value. Also getting a heal trigger, Leon plows through Asaka's defenses for a comeback victory. Afterwards, Leon gets reacquainted with Aichi, telling him that he and Team Dreadnought are now enrolled in a high school at Hong Kong; they have also been invited to participate in Japan's VF High School Championship. Then, Tetsu offers someone from the Miyaji Cardfight Club for a match. Ever eager to play, Naoki accepts, and Tetsu arranges for his opponent to be Ultra Rare's Suiko Tatsunagi, who is revealed to be a student of Fukuhara High. But when Naoki comments that Suiko's sailor uniform does not suit her, she gets peeved as the two begin their battle.

After Naoki makes another offhand comment towards Suiko, the two start their cardfight. Suiko criticizes Naoki for being a good but uninteresting fighter. He tries to prove her wrong when he activates the Limit Break of his new ace card: Armor Break Dragon. At the cost of discarding three cards from his hand, Naoki not only eliminates Suiko's front-row rear-guard units, but he also increases Armor Break Dragon's power and critical value to unbelievable heights. Despite this, Suiko defends against Naoki's attacks with almost all of the cards in her hand. On the following turn, Suiko wins the game with Chief Nurse, Shamsiel by moving cards to and from her damage zone thus increasing most of her units' power. Afterwards, Naoki apologizes to his friends for his loss and realizes how weak he actually is. Shingo cheers him up (although with some harsh choice of words) and says that he'll train Naoki to become stronger. Then, Ren Suzugamori appears and is revealed to be the captain of Fukuhara High's Vanguard Club. Ren suggests to have a match with Aichi, showing him a glimpse of his reversioned Shadow Paladin deck. But this turns out to be a tease from Ren, who retracts his match request and dismisses everyone. As the Miyaji Cardfight Club and Team Dreadnought leave Fukuhara High, Leon tells Aichi that if he wants to fight Dreadnought at the VF High School Championship, then he will have to first defeat Fukuhara High at the regional qualifying tournament.

The Cardfight Club is forced by the Miyaji student council to take the main stage on the day of the academy's upcoming School Festival. The student council hopes to use this chance to embarass the club and tarnish its reputation. Despite the daunting task, the club decides to do a stage play using one of Shingo's prewritten scripts and with costume help from Emi and Mai. The script is loosely based on The Tale of the Bamboo Cutter but with Vanguard units; Aichi is given the role of the bamboo cutter (Little Sage, Marron), Misaki is the heroine (CEO Amaterasu), Naoki is the villain (Eradicator, Vowing Sword Dragon), and Kourin is the hero (King of Knights, Alfred). Although Kourin is seemingly busy with her job as an idol, Misaki notices that she is in fact preparing for the play. However, on the day of rehearsal, Kourin does not show up, which leads the club (except Misaki) to think that she is not serious about the play and that Aichi should take the role of Alfred. The day of the School Festival finally arrives, and all of Aichi's friends have come. Unfortunately, Kourin is not at school. To make matters worse, the club is informed by Suwabe that the club's time of performance is actually an hour earlier than scheduled. As the club hastily sets up for the play, Misaki learns from Akari why Kourin did not show up for rehearsal. The play then goes underway with Shingo narrating the story. But when the time comes for Kourin's scene, Naoki accidentally destroys the set and his costume, causing the audience to grow angry. Before the play is totally ruined, Kourin appears in her costume and saves the show when she declares a new adversary for her to face: the legendary fighter Daigo.

The sudden appearance of Daigo surprises everyone and also attracts more students to watch the Cardfight Club's play unfold. Posing as the "real" villain of the play, Daigo is challenged by the hero Kourin to a cardfight for Misaki's freedom. Although Kourin applies a lot of pressure to him shortly into the fight, Daigo eventually gets a heal trigger and deals 5 damage to her, putting her in a tough situation. However, she is cheered on by Misaki and subsequently the audience to not give up. Kourin regains her composure and tries to end the game with the Limit Break of Leading Jewel Knight, Salome. Unfortunately, she does not do so. Daigo then uses White Dragon Knight, Pendragon's Limit Break to superior ride his new ace: Sanctuary Guard Dragon. He activates its Limit Break to overpower and defeat Kourin. Although the hero Kourin loses, Misaki, Aichi, Naoki, and Shingo all step up to challenge Daigo for their fallen friend. Daigo fakes being weakened by the club's strong bonds of friendship and then takes his leave. With that, the play ends with a happy ending and a round of applause from the audience. Aichi expresses his thanks for Daigo as a montage of Misaki's pictures (taken by Shin) during the play is shown.

The Vanguard Fight High School Championship finally begins with the Miyaji Cardfight Club having to attend the Kanto regional qualifiers. In the waiting room, the club sees Fukuhara's and Hitsue's Vanguard teams. In particular, Hitsue's team has a surprisingly strong look of determination to win the entire tournament. The first round pits Miyaji Academy against Hitsue High in a best-of-3 match. In the first game, Kai defeats Shingo, which puts Hitsue up 1-0. The second game features Miwa vs. Misaki. For the sake of his teammates, the typically-carefree Miwa goes all out with the Limit Break of Hellfire Seal Dragon, Blockade Inferno to retire all of Misaki's grade 2 rear-guards and gain a significant amount of power. Misaki completely defends herself, but she is left with a weakened battle formation. Nonetheless, on her next turn, Misaki rides Goddess of Good Luck, Fortuna and reassembles her forces. She also activates Fortuna's Limit Break to perform three drive checks and manages to get two drive triggers to increase her overall power, ultimately winning the game and tying the score 1-1. For the third and final game that will decide which team will advance through the tournament, Aichi and Izaki must fight each other.

The decisive fight between Aichi and Izaki ensues. Although Izaki is underestimated by the majority of the people watching, he nonetheless is serious about wanting to catch up to Aichi's level of strength. Aichi notices his fighting spirit and the two continue to play to the best of their abilities. Despite the large amount of pressure from Izaki's Ancient Dragon units, Aichi pulls off a comeback victory. Izaki sheds tears of frustration over this loss, but his effort is rewarded with applause from the crowd. The regional qualifier progresses to the final round, in which the Miyaji Cardfight Club will face off against the Vanguard Club of Fukuhara High.

The members of the Miyaji Cardfight Club draw lots to decide who will play against the Fukuhara Vanguard Club in the final round of the Kanto regional qualifier. Naoki is selected to be first, Kourin is second, and Aichi is third. After some pre-fight conversations between Miyaji and Fukuhara, the two teams send their fighters for the first game. Naoki once again fights against Suiko. Unlike what happened in their previous encounter, Naoki chooses to not preemptively use the Limit Break of Armor Break Dragon in order to maintain the cards in his hand. He survives Suiko's Break Ride combo attack, but he is left in a tough situation and begins to question himself. With some encouragement from Aichi, Naoki trusts his instincts and activates Armor Break Dragon's Limit Break, climactically winning the game and putting Miyaji up 1-0. For the second game, Miyaji's Kourin will face Fukuhara's Asaka.

Kourin and Asaka fight each other in the second game of the final round with both of them having their own reasons to win. Kourin hopes to win for the sake of her teammates while Asaka fights for Ren. The cardfight is a seesaw battle until Kourin deals 5 damage to Asaka. However, this allows Asaka to use a Limit Break Ride combination move with Miracle Pop, Ava and Nightmare Doll, Chelsea. She superior calls more of her units to the field to launch multiple attacks, which gives her the win over Kourin. Although frustrated by this loss, Kourin is comforted by her teammates that they will win in the end. The last fight is coincidentally a rematch between Aichi and Ren, who reverts back to his Shadow Paladin deck but themed around the Revenger archetype. With both players stronger than before and Ren showing signs of his former sinister self, who will emerge victorious in the Kanto regional qualifier?

Aichi and Ren face off in the third and last game of the Kanto regional qualifier. As the fight unfolds, Kai watches and is concerned about them. Despite Aichi's best efforts to land a final attack with Blaster Blade Liberator, Ren survives and finishes the battle with a final blow from his reborn avatar: Blaster Dark Revenger. With that, Fukuhara High wins the regional tournament and therefore moves on to the VF High School Championship. Aichi apologizes to his teammates, but they are not upset by his loss and instead cheer him up. During the awards ceremony, Kai leaves after coming to the conclusion that both Aichi and Ren have become too strong for him. As the Kanto regional qualifier comes to a close, the Miyaji Cardfight Club looks forward to more cardfighting in the future. However, unbeknownst to the club, the Miyaji student council continues to scheme for the club's abolishment...

After reporting to the student council president about the Cardfight Club's loss at the Kanto regional tournament, Suwabe moves on to his next plan of terminating the club. He gets the Paranormal Power Research Society, a group of delinquent-looking students who are interested in supernatural forces, to challenge the club to a cardfight on the rooftop of the school. However, instead of the Cardfight Club, Leon and Team Dreadnought appear and accept the challenge. Nonetheless, Eru Nakagami, the leader of the Research Society, engages in a Vanguard fight with Leon. Nakagami uses his Dark Irregulars deck and also unleashes his sealed paranormal powers to push for victory. Regardless, Leon defeats Nakagami by putting him in a no-win situation with Last Card, Revonn. All the while, the Cardfight Club enjoys lunch along with Takuto.

Aichi has an ominous nightmare in which Misaki, Kourin, Naoki, and Shingo all leave him. Worried about the dream, he then goes to school and is relieved to see his friends are there, except for Kourin. After school, Aichi arranges for the Cardfight Club to meet at Card Capital. Naoki goes back into the classroom to retrieve his bag and then decides to follow the student council's secretary. He is eventually led into a strange hidden room where he sees the secretary talking with an unknown person about monitoring the Cardfight Club. At Card Capital, Aichi expresses his worry to his friends over Kourin's absence. Naoki enters the shop, but he is acting like a completely different person. As if possessed by a dark force, Naoki challenges Aichi to a cardfight, which he accepts. The fight reaches a turning point when Naoki declares "Final Turn" and does a Crossbreak Ride with Eradicator, Vowing Saber Dragon "Reverse". This move allows Naoki to retire all of Aichi's rear-guards and increase his overall attack power. Determined to return Naoki to his former self, Aichi withstands Naoki's assault and rides Wolf Fang Liberator, Garmore on the following turn. He uses its Limit Break to superior call more units from his deck to refill his entire field, winning the game for Aichi. Naoki collapses and then gets up but with no memory of what just happened. Moreover, when Kai picks up the Vowing Saber Dragon "Reverse" card, it mysteriously vanishes.

Kai meets with Takuto and tells him about the incident with Naoki. Takuto explains that it is the work of Reverse, a phenomenon created by the evil Void in its quest to envelop everything in darkness. He further elucidates that those who are Reversed will lose their souls and become engulfed with Void's energy if they lose to a Reversed fighter. It is then revealed that Takuto has been Reversed and is now an agent for Void. The two engage in a cardfight, and Kai is surprised to see Takuto's deck representing Link Joker, a never-before-seen clan that acts as the harbinger of Void. As the fight progresses, Kai is shocked by the terrifying Lock effect of Link Joker; his units are sealed away from being used until the end of his turn. Kai refuses to surrender, but when Takuto does a Break Ride and Locks two more of Kai's units, will Kai be able to still win?

The fight between Toshiki Kai and Takuto Tatsunagi continues. Takuto repeatedly taunts Kai and tries to tempt him with the power of Link Joker. Kai manages to work around his units being locked, but Takuto is able to defend against Kai's attacks. Ultimately, Takuto succeeds in brainwashing Kai using Reverse. Kai appears unexpectedly at Fukuhara High School. Finding that Ren Suzugamori is not there, Kai challenges Tetsu Shinjou instead

Possessed by the power of Link Joker, Kai goes to fight Tetsu, a person he deems worthy of passing it on. If Tetsu can't successfully fend off this new, mysterious deck with its confounding power to "lock" cards, he'll become infected too, and seek out other fighters

All Ren wanted to do was check on Asaka and Tetsu, whom he swore to protect, but he'll have to defeat the Reversed Suiko first... or end up being Reversed and under Void's power himself!

Ren and a Reversal-recovered Suiko finally find Asaka, but it's too late: she's been Reversed, too! Asaka throws down the gauntlet to Ren, and if he loses this match, he'll be made into her mindless marionette.

The battle between Ren and a Reversed Asaka reaches a fever pitch! If he loses, he'll become a mindless slave (according to her). But if Ren wins, will Asaka ever live down the things she's saying to him?!

As Ren fights his Reversed best friend, Tetsu, we go back several years to see how they first met, when Ren was a wide-eyed freshman and Tetsu was a juvenile delinquent brawler who wanted to have nothing to do with him.

The rooftop "boss battle" between Ren and Tetsu concludes here! Can Ren bring Tetsu back from the brink? And if so, what's the next move?

Mitsusada returns from Singapore, only to be confronted at the airport by a strong Reversed fighter! In the meantime... Chris of Team Genius has been possessed by an unearthly power before. Can he withstand this, or will he become part of the outbreak of Reversed people?

The Reversed Mitsusada intends to gather an army, and he's already started with a Reversed Team Genius. Yuri will be the next one to succumb, unless she either beats her captain or somehow breaks through the mind control!

Koutei's reign as "dark emperor" continues as he seeks to increase his Reversed subjects by three... Leon, Jillian, and Sharlene! Will Leon even make it to the VF High School Championship?!

It's the finale at the airport, with Leon as the last defense against Koutei and his small army of Reversed fighters. But now that Jillian and Sharlene have been Reversed too, will Leon be able to win on his own?!

While the students of Miyaji Academy go on a trip, the Student Council members try to destroy the Cardfight Club's reputation. Then, the gang watches the final match of the VF High School Championship between Ren and Leon!

Something seems to be wrong with Kourin during the school camping trip. And why did she just invite Aichi to the legendary romantic tree?! Meanwhile, after pulling an all-nighter of intensive Vanguard training, the president and vice-president of Student Council lurk around, waiting for the perfect chance to use their newfound Cardfighting prowess to take down Aichi's club!

On a visit to Miyaji Academy, Gouki and his pirate buddies get Reversed, then turn the school's open house into a pirate recruiting effort. But before you can say "Arrrrr," Kamui arrives to put an end to the pirate factory and save Emi and Mai from certain peril!

Kamui hopes the fist of friendship will reverse the Reversed Gouki to normal! Emi and Mai are betrayed by a friend! And the old Ninja Master returns with a new name to take on a Reversed opponent of his own!

The fight between Ninja Master Neo and the Reversed Nagisa begins, with the latter furious at the former for standing in her way. Neo deals 5 damage to Nagisa, but she was awaiting this moment as she Crossbreak Rides Deadliest Beast Deity, Ethics Buster "Яeverse". This Limit Break Ride combo allows Nagisa's units to attack Neo 8 times, who manages to survive thanks to a heal trigger. Despite Neo having less cards to use than Nagisa, he mounts a comeback with his own Limit Break Ride combo with Shura Stealth Dragon, Kabukicongo to bind most of Nagisa's cards from being usable to land a finishing blow and win the game, thus reverting Nagisa to normal. Neo takes his leave, and Nagisa and Gouki team up to take on the other Team Handsome members in cardfights to free them of Reverse. Meanwhile, Kamui, Reiji, and Eiji continue their search throughout Miyaji Academy for Emi, Mai, and their kidnapper Rekka.

Reversed Rekka wants to beat Kamui; Kamui wants to save Emi and Mai; and Reiji and Eiji have to beat an army of Reversed Rekka groupies! Can they do it?!

Kamui continues his battle against the Reversed Rekka, who reiterates how she has no friends despite Emi and Mai being there for her ever since she transferred into Miyaji Academy. After both fighters perform Crossbreak Rides and stop each other's attacks, Kamui points out a flaw in Rekka's logic of using Emi and Mai as hostages when it would have been easier to Reverse them. This is proof of how Rekka does not actually want to Reverse Emi and Mai and that despite her earlier claims, she deeply cares about them as friends. While Rekka reels from this exposure, Kamui launches multi-pronged attacks to win the fight and dispel her of Reverse. Along with Emi, Mai, and Team Handsome, Kamui and Rekka then battle and defeat Reiji, Eiji, and the Rekka Corps, lifting the spell of Reverse from them. Emi expresses her thanks to Kamui, which causes him to run off in embarassment. At the front of the school, he runs into Maki and Kourin who have just arrived from the camping trip. Kourin gives a troubling look towards Kamui as an airplane flies overhead.

Kamui quickly realizes that Kourin is Reversed and resolves himself to defeat her in a cardfight to lift the spell from her. He quickly deals 5 damage to Kourin, who responds by using the card that she could not bring herself to use against Aichi during the camping trip: Broken Heart Jewel Knight, Ashley "Reverse". She uses its devastating Limit Break to retire Kamui's units while increasing her own forces to eventually overpower and defeat Kamui. Meanwhile, Kai returns to Japan and is escorted by Takuto's assistant until he sees Miwa. Aichi and his classmates finally return to Miyaji Academy where Aichi sees Kamui reeling from his loss to Kourin and about to become Reversed. While Aichi and his friends try to understand the situation, Takuto appears in a live worldwide broadcast in which he announces the beginning of the world's destruction.

Continuing his broadcast which is only visible to cardfighters, Takuto reveals everything about Reverse and the black rings in the sky scattered around the world. He explains that those are gates which grow with each fighter becoming Reversed, eventually enveloping the entire world in darkness. At the end of the broadcast, as Aichi and his friends come to grips with this revelation, Kamui finally succumbs to Reverse and challenges Aichi. Soon becoming overwhelmed by an increased number of Reversed fighters, Aichi and his friends escape along with Gouki, Nagisa, Emi, Mai, and Rekka thanks to the timely arrival of Shin. Elsewhere, Miwa fights Kai using the latter's Kagero deck in an attempt to open his eyes. However, his efforts end in vain as Kai defeats him with Star-vader, Chaos Breaker Dragon while also telling Miwa that he became Reversed of his own volition to become as strong as Aichi and Ren. At Card Capital, Aichi and his friends decide to confront Takuto for information. Suddenly, Miwa, now Reversed, appears and tells them that they will have to fight Kai before getting to Takuto. He also tells Aichi that he and Ren are what drove Kai to becoming Reversed in the first place. After Miwa takes his leave, everyone resolves themselves to press onward, but Aichi is showing signs of hesitation after what Miwa said...

While everyone is still coming to grips with this entire situation, Leon appears before Aichi and his friends. He not only tells them the solution to returning Reversed fighters to normal is defeating them in cardfights, but he also informs them that he plans on going to fight Kai and wants Aichi to join him. He agrees, but then Leon proposes to have a fight instead. Shortly into the battle, Leon calls the fight off, noting that Aichi's heart is locked by the thought of having to fight Kai. Leon leaves after further deeming Aichi as being unable to achieve victory in his current state and unworthy of fighting alongside him. While Aichi looks inside himself for answers, Naoki follows Leon outside and says that he wants to go with him in Aichi's place. Leon decides to test Naoki's skills in a cardfight with Shingo observing them. Meanwhile, Jun Mutsuki gathers his fellow underground fighters in an effort to counterattack the Reversed fighters until Miwa appears before him. Quickly realizing Miwa's Reversed state, Jun cardfights him. Although he drives Miwa to the brink of defeat, Jun is unable to deal the final blow to him. Miwa wins using Dauntless Dominate Dragon "Reverse", leaving the now-Reversed Jun to take on the other underground fighters. After beating Naoki several times, Leon finally decides to leave until Shingo intervenes. Before departing, Leon recommends for Naoki and Shingo to take care of Aichi. So, the two decide to train in preparation for the big confrontation.

After much training, Naoki finally constructs a suitable deck with help from Shingo. The two then decide to go and reclaim Miyaji Academy from the Reversed fighters inhabiting it. They encounter Maki, who summons all of the Reversed fighters (except Kamui and Kourin). Together, Naoki and Shingo take on all of the fighters, defeating them one by one. However, unbeknownst to Naoki as he continues fighting, Shingo loses to Maki. After beating the last of the Reversed fighters, Naoki searches for Shingo but then comes across Naitou and Suwabe. Soon after, Naoki finds Shingo but is shocked to discover that the latter is Reversed. Determined to bring his friend back, Naoki engages the Reversed Shingo in a cardfight. Naoki gains an early advantage, but Shingo strikes back with Covert Demonic Dragon, Hyakki Vogue "Reverse" and its Limit Break. With the Reversed Shingo denouncing all sense of friendship he had with the Cardfight Club, Naoki begins to lose the will to fight until he hears the real Shingo's voice, motivating him to continue the battle...

Naoki uses Eradicator, Tempest Bolt Dragon to defeat Shingo, thereby freeing him of Reverse. Naoki, Naito, and Suwabe then take Shingo inside the school where he regains his senses. Meanwhile, Aichi thinks about what Leon said to him as he walks to Card Capital. Once there, he wonders where Naoki and Shingo are, and Misaki deduces that the two have gone off on their own to take on any Reversed fighters. Back at Miyaji Academy, Naoki remembers the secret room where he previously followed Maki to, and it is there that Naoki engages her in a cardfight while Shingo, Naito, and Suwabe watch. As the two wage battle, Maki reveals she knows about how Naoki was previously a loner like herself and further exclaims that he should embrace the darkness of Link Joker like she has. As Naoki gets caught up in Maki's image, Shingo reminds Naoki that he is not alone. Those words snap Naoki out of the image; he then goes on to beat Maki with Tempest Bolt Dragon. Her loss means that the last of Miyaji Academy's Reversed fighters have been dealt with, resulting in the gate floating above the school dissipating. Afterwards, Maki, no longer Reversed, regains consciousness under the care of Naito and Suwabe, both of whom discovering a new appreciation for Vanguard. Aichi and Misaki arrive and meet up with Shingo and Naoki, who collapses from exhaustion. When Shingo tells them about Naoki's reasons for doing all of this, Aichi finds the resolve to confront his other Reversed friends and starts heading towards Takuto's place.

Aichi, Misaki, Naoki, and Shingo walk to Takuto's headquarters but are stopped by the appearance of the Reversed Kamui. Aichi feels that he must fight him and proceeds to do so. In the midst of the battle, Kamui expresses his frustration over how Aichi became stronger than him despite both of them being together for so long. He then Crossbreak Rides Deadliest Beast Deity, Ethics Buster "Яeverse" and launches 8 attacks in a single turn, but Aichi manages to survive. Aichi responds by saying that he not only admires Kamui but also that he became stronger because Kamui, Kai, and Misaki were there with him from the beginning. Then, Aichi Crossbreak Rides Liberator of Bonds, Gancelot Zenith and uses its Limit Break to superior call Blaster Blade Liberator to land a final blow on Kamui, thus winning the fight and freeing him of Reverse. With Kamui back to his normal self albeit fatigued, Aichi and his friends continue to travel to Takuto's headquarters. Once there, they are confronted by the Reversed pair of Miwa and Kai.

In front of Tatsunagi Corporation HQ, Miwa wants to cardfight Aichi, but Misaki insists on being Miwa's opponent instead. Steadfast on returning Miwa to his former self, Misaki recalls how Miwa is really a caring person underneath his usual carefree demeanor. After repelling Miwa's Crossbreak Ride combo with Dauntless Dominate Dragon "Яeverse", Misaki performs her own Crossbreak Ride with Omniscience Regalia, Minerva and defeats Miwa, thus lifting the spell of Reverse from him. After everyone gathers around Miwa as he regains himself, Aichi makes a direct challenge to Kai.

With Takuto monitoring them from afar, Aichi and Kai finally confront each other. When Aichi questions Kai on his actions, he explains his reasoning as to why he chose to be Reversed despite the consequences. Wanting to save Kai like he did when Aichi was under the negative influence of Psyqualia, Aichi engages him in an intense cardfight. Aichi is put in a seemingly hopeless situation, and although he stays determined to win, Kai thinks otherwise...

Aichi tries to end the match with Liberator of Bonds, Gancelot Zenith, but Kai completely defends himself. Kai then uses Star-vader, Chaos Breaker Dragon to finish off Aichi and walks back into the Tatsunagi HQ building, leaving Aichi to be Reversed. However, Team Dreadnought shortly appears, and Leon tells Aichi to use Psyqualia. With help from the real Takuto in a spiritual form, Aichi prevents himself from being Reversed but is left exhausted. Then, Leon informs everyone about how he rescued the real Takuto and their plans to infiltrate Tatsunagi HQ to defeat Link Joker. Aichi wants to join them, but Leon and Takuto tell him that Aichi's Reverse process was only temporarily stopped. They also say that if Aichi fights again in his current state, it could be fatal. So, leaving Jillian and Sharlene to take care of Aichi and his friends, Leon and Takuto prepare to go inside Tatsunagi HQ.

Leon and Takuto enter Tatsunagi HQ and confront Reversed Takuto, who sends Leon away and traps Takuto in black rings. Leon is transported to another room where he encounters his Reversed future self. The two Leons then fight each other, and the Reversed Leon eventually uses Blue Storm Karma Dragon, Maelstrom "Яeverse". Along with its powerful Limit Break, Reversed Leon puts an enormous amount of pressure on Leon while also retiring his rear-guards, leaving him with almost nothing. Against all odds, Leon uses Tetra-drive Dragon to defeat his Reversed self, who disappears after the long battle. Leon is left fatigued and is transported back to the original room where Takuto, freed from his bindings, challenges his Reversed self to a cardfight.

Takuto faces off against his Reversed self while outside, Aichi is being protected by his friends when they get surrounded by other Reversed fighters. Takuto uses Salvation Lion, Grand Ezel Scissors to unlock his rear-guards from Reversed Takuto's lock effects, but he responds with Star-vader, "Omega" Glendios. Reversed Takuto uses its Limit Break to permanently lock all of Takuto's rear-guards one by one while also preventing him from using Ezel Scissors's skill to unlock them. After locking all of Takuto's rear-guards, Reversed Takuto activates the Ultimate Break of "Omega" Glendios to automatically win the fight and then absorbs Takuto into his body. Soon after, Aichi appears before Reversed Takuto.

Aichi challenges Reversed Takuto, who arranges for the Reversed Kourin to be Aichi's opponent and leaves. Misaki makes her way up to where Aichi and Kourin are having a high-stakes cardfight. It is revealed that Kourin (along with Rekka and Suiko) has no memories of her past because of Takuto, and she fears of losing her current memories if she is defeated. Through sheer spirit, Aichi stays strong and wins by using a card that was given to him by the real Takuto: Liberator, Monarch Sanctuary Alfred. Kourin is freed from the spell of Reverse and then faints. Intending to go face Reversed Takuto, Aichi asks Misaki to take care of Kourin, but they are all soon confronted by more Reversed fighters.

Just as Aichi and his friends are surrounded by more Reversed fighters, Teams Asteroid and Avengers appear. They fend off the Reversed fighters while Aichi and Ren go together to face Reversed Takuto, who has revealed himself as being the emissary of Link Joker. They meet on the rooftop of Tatsunagi HQ, where Reversed Takuto states that he has completely absorbed the original Takuto and has gotten stronger from doing so. He further explains that the world will end once the gate floating above them fully opens. Then, Kai appears and challenges Ren. And so, the two wage battle as Aichi and Reversed Takuto observe, with Kai returning to his Kagero deck. As the cardfight ensues, Ren expresses his enlightenment in fighting against Kai while showing signs of his former sadistic self when he was possessed by Psyqualia. Kai responds by forewarning Ren's defeat once his true power is unleashed...

The battle between Ren and Kai draws near the end as Ren declares "Final Turn". He Crossbreak Rides Revenger, Dragruler Phantom and activates its Limit Break to automatically deal 1 damage to Kai, bringing him closer to defeat. Despite that, Kai protects himself from Ren's assault and responds with his own "Final Turn" announcement. He Crossbreak Rides Dragonic Overlord "The Яe-birth", locks all of his own rear-guards, and launches a triple attack on Ren with it. Exhausted of all of his heal triggers, Ren loses and faints while in the process of being Reversed. Aichi is left as the only person who can take on Reversed Takuto and Kai. Reversed Takuto orders Kai to fight Aichi, but he refuses because he already beat Aichi and no longer deems him as a worthy opponent. So, Reversed Takuto takes it upon himself to cardfight Aichi.

The cardfight between Aichi and Reversed Takuto begins. Although Aichi inflicts 5 damage, this allows Reversed Takuto to start setting up his "World End" strategy with "Omega" Glendios by locking almost all of Aichi's rear-guards. Reversed Takuto also tries to make Aichi falter by making Aichi the villain. Moreover, Reversed Takuto mentions that if Aichi defeats him, then Kourin will also be badly affected. After Aichi takes another hit from Reversed Takuto's Glendios, the gate above Tatsunagi HQ opens, and Link Joker units emerge from it and start their invasion on Earth.

While the Link Joker units have begun attacking Aichi's friends, Aichi is still wavering after hearing Reversed Takuto's words. Just as Aichi loses hope, he hears the many cries from his friends who are still fighting, which motivates Aichi to continue the battle. Aichi rides Liberator, Monarch Sanctuary Alfred to return his locked units to the deck and superior call them back to the field, thus countering Reversed Takuto's "World End" strategy. Aichi defeats him, which causes the many gates over the world to disappear along with the invading Link Joker units and all of the Reversed fighters returning to normal. However, about to also disappear, Reversed Takuto tries to take Aichi down with him in a last ditch effort, but he is stopped by the appearance of the original Takuto. Apologizing to Kourin, Rekka and Suiko, Takuto sacrifices himself and dissipates along with his Reversed self. Although the long battle against Link Joker seems to be over, the gate above Aichi is not completely gone, and he is soon confronted by Kai, who is still Reversed...

The gate above Tatsunagi HQ slowly crumbles, which prompts everyone to evacuate the building while Aichi and Kai are still on the rooftop. Much to Aichi's shock, Kai reveals that he never was completely Reversed and was consciously Reversing others despite knowing the consequences of his actions, all for the sake of becoming the strongest. He also wants to fight Aichi again before he returns to normal in order to see who is the strongest between the two of them and whose path was right all along: his or Aichi's. And so, Aichi and Kai cardfight each other while everyone else watches from below. Thinking that he will only hurt Aichi and his friends again, Kai intends for this to be the last fight he will have against him and will be gone once it is over. However, Aichi tries to convince Kai that he is not alone and further exclaims it was because of him that Aichi is the person he is now. Despite Aichi's cries to bring him to his senses, Kai continues the fight by riding Dragonic Overlord "The Яe-birth"...

The last fight between Aichi and Kai is reaching its climax. Despite the overwhelming Limit Break of Kai's Dragonic Overlord "The Яe-birth", Aichi nullifies most of its attacks. Kai insists on ridding himself from the world because of the sins he committed, but Aichi finally gets him to realize that he has and always will be there for him. Upon understanding that, Kai's Reverse is dispelled as well as the effects of Reverse that were still inside Aichi. They both continue the fight to the best of their abilities. In the end, Aichi defeats Kai with a final attack from Blaster Blade Liberator, the card that connects the two. Aichi and Kai then descend the Tatsunagi building and reunite with their friends as the gate above fully disappears. Some time later, life returns to normal as Kai walks to Card Capital, where he will play against Aichi, who he now recognizes as the strongest fighter and his best friend.