Waka, a big-breasted mother, lives her days with dignity as a devoted single parent. However, her teenage son Ken-chan has recently developed a strong interest in her voluptuous breasts, gradually making breast groping a daily occurrence. Desperate to keep this forbidden secret from the neighbors, Waka gently pleads, "C'mon... Ken-chan... You're a good boy... Please... stop now..." Yet her son ignores her, using a newly acquired electric massager to press against her groin, refusing to cease his actions. This heartbreaking story portrays the painful clash between a mother's duty and a son's twisted affection.