Two years into her marriage, Mahiro and her unemployed husband move into Uncle Toru's home after he gives the husband a job at his company. Once they settle in, Mahiro faces another problem: her husband refuses to give her any foreplay, calling it dirty and leaving her to masturbate alone. Toru knows everything. He enters her room while she is pleasuring herself and drives his tongue between her legs. Still sensitive from her first orgasm, she cannot withstand his caresses and cums over and over.