Misaki (Hoshia Arisu), a mother subjected to daily violence from her truant son, suffers in silence after her husband ignores her pleas for help. One day, a mysterious man wearing a balaclava suddenly appears at her home and rapes her. However, the man utters one word: "Mom." Upon realizing the attacker is her own son, Misaki finds herself unable to resist, slowly accepting the forbidden act. The boundary between mother and son is irrevocably crossed. With her massive breasts on full display, Hoshia Arisu delivers an intense performance embodying a mother's conflicted emotions. A shocking storyline unfolds.