After moving into her husband's family home, the Tsuruta couple are warmly welcomed by her father-in-law, Bungo, bringing them temporary peace. However, while her husband is away on a business trip, Bungo—whose lustful gaze toward Mai has long been evident—overpowers and forces himself on her. Overcome with sorrow and humiliation, Mai breaks down in tears, unable to suppress her anguish. But Bungo's desires know no limits, and he continues to torment her day after day. With no chance to wait for her husband's return, Mai finds herself completely under her father-in-law's control, her life utterly transformed as she is forced onto an even darker path.