The house of his kind uncle, who never complained, was like heaven to Tatsuo, a student who was preparing for his entrance exams. That's because Tatsuo was spending his time watching AV instead of studying... However, his uncle is hardly ever at home these days, and whenever he sees his aunt Mao, she just nags him. Even Tatsuo is starting to feel uncomfortable about this. One day, Tatsuo comes across Mao, who is trying to get rid of her AV collection...