After her first masturbation since the divorce, Sae found herself overwhelmed with uncontrollable desire when she was caught naked by her daughter's handsome boyfriend right after a bath. That night, touching herself for the first time in ages, she experienced a long-forgotten sense of release. The next day, while her daughter was away, the boyfriend came over and began making advances she couldn't resist. Torn between her growing attraction and the awareness that it was wrong, Sae could no longer deny her urges. The forbidden triangle between mother, daughter, and boyfriend spirals into a thrilling and dangerously erotic affair.