Toko serves as managing director at her husband's company. Due to her husband's multiple mistresses, their marital relationship has all but disappeared. One day, a sincere and pure young man named Saishi joins the company as a new employee. Captivated by his honest gaze, Toko begins indulging in masturbation daily. When her husband leaves for an overnight business trip, Toko sees her chance and orders Saishi to accompany her. Upon arriving at the destination, she invites him under the pretext of a celebration party, gets him drunk, and proceeds to repeatedly offer her pussy—framing it as "education"—to satisfy his innocent heart.