She is Not Good at Cleaning Every Day

"...I think I have to do something about it every day."

She is also doing well with her boyfriend of six months. Aina Tawara is admired as a "nice girl." Her current problem is that she can't keep her room tidy. On the other hand, there is Mr. Fukagawa, a man who always keeps a clean desk, does not care what others think of him, and returns home on time every day. He is the complete opposite of herself, and while she is annoyed by his bad attitude, she is also envious of him... Aina's room is not finished and she has to cancel her promise to her boyfriend on the worst Christmas. Aina is depressed, but Mr. Fukagawa invites her to his room...?