After divorcing her violent husband, Chisato lives peaceful days with her son. However, her sexual frustration keeps building up, and she spends each night masturbating to find relief. One day, Chisato is threatened by the landlord Kurihara and ends up being raped against her will. Despite her reluctance, her body craves sex after a long time. That same night, she accidentally sees her son's erect penis and becomes aroused again…
