Sae Bom, Bo Ra - Relative Sister (2020)

Chan-joon, living with an open-minded relatives sister (Purple). He doesn't care about Chan-Jun at all by bringing his boyfriend (Gang-seo) home and having sex with him, which is why Chan-Jun started to meet another man after he was finally separated from sex with his girlfriend (New Spring). A heartbroken Chan-jun rescues Bora from being forced to go out on a date by Kang-seo. After the conflict, Bora enters Chan-Jun's room.