Aoki Momo, a maternity yoga instructor, secretly seduces a married man during a couple's trial lesson at her studio. Lured by her persuasive words to sign up, the husband begins visiting the studio, avoiding his wife's gaze, gradually succumbing to Aoki's advances. Using sweet sadistic tactics, she stimulates his erogenous zones and forces creampie sex. Even on her delivery day, she shows extreme dominance by showing up at his home, extracting semen from him as he's engrossed in cheating intercourse, revealing her insatiable control.