A woman and her oversized cat live in the same apartment without ever quite living together, and somehow that distance is the whole point. Yukichi cooks, budgets, worries about sales, and feels genuinely tired by the end of the day, which means he's not a magical solution to Saku's chaos, he's just someone (something) sharing the weight of existing. The comedy lands because it treats depression and domestic inertia as the permanent condition of life, not a problem waiting for a third-act fix.
Saku's life gets turned upside down when a mysterious black cat appears at her door. She feeds him out of pity, expecting him to move on. Instead, Yukichi decides to stay, and what unfolds is anything but ordinary. This oversized feline isn't content lounging around: he takes over the kitchen with surprising culinary expertise, lectures Saku about her messy habits, and somehow becomes the responsible adult in their chaotic household. Their dynamic shifts into something resembling a domestic partnership where the cat does most of the actual work while Saku flounders through daily life. What makes Yukichi tick is anyone's guess. He broods over minor disappointments, gets genuinely excited about grocery deals, and treats household management like a solemn duty. Saku remains wonderfully incompetent at basically everything, but she's not complaining when her temperamental feline roommate keeps the place running. The comedy comes from watching a cat care more about their shared living space than the human who actually lives there, creating a gentle, affectionate dynamic that thrives on everyday absurdity and low-stakes chaos.