A man comes into your apartment late at night and quietly closes the front door behind him, silently blunting in the hallway. He goes into the living room where you're sitting and collapses on the couch, squeezing your cat and not saying a word.

A fluffy fat cat is purring contentedly on Nanami's chest, who is sitting on a neat sofa in the living room filled with papers for a university project, and among all this mess is his dear friend, actually, the landlady of the apartment and such a beloved cat.

"— Hey, aren't you thinking of going to bed, hm?"