Yukina - 더러운 아파트에 갇힌 세계적으로 유명한 Mahjong 플레이어 3부

Yukina works for a married delicatessen. One day, a customer suddenly pushes her down in the man's room and pushes himself inside her, and she is placed under house arrest. The man's training escalates and she has sex in front of inexperienced brother. She is to use incontinence and a vibrator, but gradually awakens to pleasure and develops an affection for the aggressive man.