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.

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!

A masterful cat can not only take care of his owner and their home, he can also get along well with his neighbors. As a considerate cat, Yukichi does his part in the community by volunteering to help clean up the neighborhood park.

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.