The young man, Yuusuke, who was fired from his company and also evicted from his home, ended up staying with his brother's family until he found a new job. However, he felt out of place even there and was daily berated by his brother, who scorned him, "It's pathetic to still be a virgin at 30." Desiring to build his confidence, Yuusuke made a lifelong request to his sister-in-law, Aoi, to take his virginity. Sympathetic to Yuusuke, Aoi agreed to a limited extent, but upon the moment of penetration, she was overwhelmed by an intense pleasure that left her numb.