The father, consumed by jealousy over his daughter Tugumi's boyfriend, forcibly kisses her out of overwhelming affection. Enraged, Tugumi locks herself in her room. Desperate not to be hated by his daughter, the father resolves to apologize and visits her room, only to find her smiling while holding a picture of her boyfriend and masturbating. Witnessing this, the father, driven by the desire to keep her all to himself, imprisons Tugumi in the house and begins sexually dominating and training her to obey his every command.