In front of my incestuous father...

Sumire was dissatisfied with her husband who only saw her as a sexual outlet, and out of loneliness she repeatedly had affairs with young men. Her son Kazuya was irritated with his mother and his father who had pushed her so far. One day, Kazuo, who has finally lost patience with the two of them who repeat their selfish behavior as usual, goes out on a rampage. It involved tying up my father and raping my mother in front of him...