Ayumi, who has been estranged from her husband and somewhat dissatisfied, recently finds joy only in tea chats with her brother-in-law, Shunsuke. However, Shunsuke, burdened with gambling debts, approaches Ayumi with the intention of humiliating her to extort money. Just before their 10th wedding anniversary when her husband is away, Ayumi is swayed by Shunsuke's aggressive confession and ends up being pushed down. Tormented by guilt, Ayumi finds Shunsuke using this against her, not satisfied with just manipulating her body…
