Keiichi and Ranka are still new in their relationship. Though Ranka looks like a typical gyaru, she's knowledgeable about games and anime, gently supporting the timid Keiichi. However, due to his lack of sexual experience, Keiichi lacks confidence in taking the lead—even when Ranka asks him to be more aggressive, he ejaculates immediately upon penetration. Worried about his son's performance, Keiichi's father devises a plan to be alone with Ranka and secretly mixes an aphrodisiac into her tea. As the drug takes effect, Ranka's body heats up and she gradually loses consciousness, helplessly pulled into the arms of Keiichi's father...