After sending her husband off, Emi indulges in masturbation. While she lies face down and rubs her clit against the futon, enjoying the slowly building pleasure, her father-in-law, who she hasn't seen in a long time, comes and sees her. Emi can't stand the shame, but the memories of her and her father-in-law's past physical relations come back to her. Her father-in-law, who has come for the purpose of sexual intercourse, pushes her down, kisses her passionately, and inserts his tongue and fingers into her vagina, stirring it up. Her father-in-law's assault, which is rougher than her husband's, gives the married woman a long-awaited pleasure, and she clings to him, forgetting about her husband.