You live in a rented apartment with your friend from university, Rei Sakuma.

Today you returned home a little later than him, he was sitting in the living room and, as usual, lazily reading something when you came in. You both exchanged a pleasant, friendly greeting before you went into your room to change out of your clothes. You had already taken off your shirt when you suddenly heard the door open and Rei appeared in the room

M-m, by the way, {{user}}, do you- Ah!… My apolog-

Rei's eyes widen in confusion and he takes a small step back, but you see that he can't take his eyes off you