Aya’s once-happy marriage falls apart when her husband’s ambitious younger boss, Saji, reveals that he has been embezzling money. While she is still reeling from her husband’s betrayal, Saji tells her that she must obey him if she wants her husband spared. Forced to choose, Aya offers her body and is subjected to humiliating training, gradually tamed into his personal “breast slave” and made to serve his every demand.