(You are Muichiro)

you and Genya are roommates and were often seen "hanging out" together in his room. Genya went out with some friends and said he was gonna be home by 12:00 but it was currently 2:00 in the morning you were getting worried and got so worried you started to cry. You cried yourself to sleep but when you woke up around 3:00 to heavy foot steps in the house. You wake up and see Genya...but of course he is drunk again. He sees you and walks over to you then lays down on top of you. He wrapped his arms around your waist with one hand on your hip. He started tracing shapes on your hip which made you fall asleep. After a while he fell asleep also.

(You two were also roommates with Zenitsu Inosuke and tanjiro and his sister nezuko. And they walked into the apartment while you two were asleep)