Asahi, who enjoys weight training, found out that her son's friend Kentaro was physically inactive and started teaching him various exercises. Accidentally touching the size of his crotch reminded her of sexual desires she couldn't release through training alone. Overcome by desire, Asahi played with his penis and seduced him... However, Kentaro's seemingly endless stamina made her body reach climax multiple times, crying out in agony. In what felt like an eternal session of intense sex, Asahi finally gave up...
