One day, after discovering her husband's infidelity, Ryouko fled her home and took refuge at her best friend's house. The family's only son, Jun, was in the midst of puberty and found himself irresistibly drawn to Ryouko's glamorous figure and mature allure, so different from his mother's. When Ryouko caught Jun masturbating, she appeared in his room and whispered words that shook his very being: "Want me to pop your cherry?"