A man who failed his university entrance exams and is living as a rōnin. He wants to focus on studying, but every night his neighbor, a gal, throws wild parties. No matter how many times he warns her, she just gets angry. Finally, the rōnin's patience snaps, and he begins his revenge. He starts making noise until morning, then attacks the girl from behind as she returns to her room with the guys. 'Hey, aren't you good at riding on top? Grind your hips harder.' Thus begins a gang rape party where rōnins gather for the gal.
