Four wives become trapped in punishing encounters with multiple Black men and their massive cocks. Azusa's affair is exposed, bringing revenge after she toyed with her lover's feelings. Akari's discarded former hookup joins other men she deceived to retaliate. Rui drunkenly cheats despite her happy marriage and discovers pleasure in anal play. Nonoka accepts a paid-mistress arrangement for wedding money, only to be threatened when the man suddenly demands repayment.