Keiichi and Ranka have been dating for about 3 months. Ranka, who looks like a gal but likes games and anime, was kind to the weak Keiichi. However, Keiichi is not accustomed to sex, and even if he is asked to blame him, he can not lead well, but rather he gets acme at the moment of inserting. Keiichi's father pays attention to such Ranka. Keiichi's father, who plans to be alone with Ranka, prepares tea with an aphrodisiac and lets Ranka drink it. And forcibly hugging Ranka's body that was lit by medicine ...