Saku Fukuzawa always brings a tasty lunch to work, but she swears she can't cook. In fact, she seems like kind of a mess for someone who's still single. Good thing she's the owner of Yukichi, a masterful who can cook and clean like nobody's business.

On that snowy night, Yukichi decided he would take care of the woman who saved him. Little did he know what he was getting himself into. Now, since Saku is freaking out that her superior might've met Yukichi in person, Yukichi silences her with alcohol.

Yukichi is depressed again today, thinking about all the problems with his owner, Saku. How can an adult human who can't even separate trash make it through life? Doing this and that, Yukichi takes care of Saku's daily life.

The day of the aquarium event finally arrives! Saku keeps telling Yukichi that it's not a date, but he seems to keep misunderstanding? Either way, she heads over to the aquarium and finds that Chief Orizuka has a little surprise with him!

Korai receives an invitation to Yume's birthday party from Oritsuka. Yume, who is fond of Yukichi, also known as "Yuki-chan," has prepared an invitation for Yukichi as well. While Yuki is hesitant about the invitation, Yukichi is eager to go, sewing stuffed toys as gifts and preparing food to bring to the party. On the day of the party, the two attend the party in costume...

It is almost the cold season when we start missing our kotatsu. However, last winter, Korai, who made a mess around the kotatsu and fell asleep, accidentally spilled beer on the outlet and nearly caused a catastrophe. As a result, Yukichi decided to throw out the kotatsu. Now, Korai wants to buy a new kotatsu, but Yukichi can't trust his sloppy owner. What will happen next?...

Saku's coworkers bring up marriage, putting Saku into a panic. Would she be able to get married to someone while having Yukichi by her side?! What if the other person found out about his masterful skills? Her cat is too talented for her to get married!

On his way to the supermarket to shop, Yukichi finds Yume in a cardboard box with the words "Please pick up'' written on it. He sees there's a kitten inside and he can't keep it at home, so he won't go home until he can find someone to keep it. Unable to abandon him, Yukichi buys cat milk for the kitten. Then it starts raining...

Koki is suddenly obligated to attend a drinking party with the managing director at Alhara. As soon as she gets home, she collapses as her nervousness melts away. Although Yukichi is shocked, he takes care her with great care...

Saku completely forgets about her company trip and suddenly has to prepare herself for two days without Yukichi by her side. She's super worried, but Yukichi helps her prepare with ease. Though, his calm demeanor makes her feel even more lonely...

One day, Saku discovers that her skirt doesn't quite fit like it used to. Yukichi freaks out and tries to limit her late night snacking, but Saku refuses. She's sure she can lose it with exercise alone! Don't take away her happiness in life!

Many workers struggle with the Monday blues. However, Yuri and Oshiro find that Saku comes into work every Monday at the top of her game. Perhaps she knows of some kind of secret countermeasure?! In actuality, Saku only thinks about work and Yukichi.

Yukichi reminisces about his past as he continues to spend his days with his worthless human. Though he has new worries every day, he manages to get by with is masterful skills. After all, he is the most masterful of cats.