Shizuka's son, Shinichi, had an uncontrollable libido and was always masturbating. In his room, AV and Onahoru were scattered and he was indulged in masturbation if he had time. Shizuka's neighbor "Kohana Non" also has a strong libido, and because of her sexual desire, she is dumped by a friend. Even if he tries to have sex on the phone, he refuses, and he has a strong sexual desire to do Zupozpo masturbation as it is. Strangely, the strongest spear and shield end up adjacent to each other as if they were attracted to each other.