Room to Room

Despite having a secret crush on Chamin, Dowan lets him move into his spare room, and the two become housemates. Until one night, Chamin comes into Dowan's room and wants... to have sex? The problem is, Chamin doesn't remember a thing each morning after. Turns out he has something called sexsomnia?! What is Dowan supposed to do now? (Source: TappyToon)