Due to aging, Kazuhiko's waning vitality left Yoko dissatisfied. At a class reunion, she was thrilled to see her old boyfriend again. Keita, her son, had been suspicious of his mother's recent cheerfulness and caught her making plans for a date. Feeling aroused by his mother's femininity, Keita couldn't help but attack her. Initially, Yoko resisted desperately, but her body responded to Keita's persistent caresses, causing them to cross the line between parent and child. Gradually, Yoko began to accept Keita… Trampling on Kazuhiko's feelings, driven by lust, the two head towards an unknown fate.
