After losing her husband, the mother becomes consumed by loneliness and develops an intense dependency on her son. She becomes obsessed with his body, reaching a point where she feels she cannot live without him. As the son grows aroused watching his mother engage with others, she gradually falls under his control. Furthermore, she begins a relationship with the son's homeroom teacher, expanding a complex love triangle. A shocking story of the mother's lust and dependence, intertwined with the son's desires and inner conflict.