"Hey, teacher, why is your penis so hard?" Ami-chan seduces her tutor, making him erect and teasing him. The tutor can't resist the temptation from his student and makes a move on him. A relationship of master and servant is forged in a room with just the two of them. The adult man, unable to resist Ami-chan, is made to ejaculate pathetically. Even when a new tutor arrives, Ami-chan's mischievous Kokoro only grows stronger. A reverse sex education that is kept a secret from her mother.