The hentai Yabai Fukushuu Yami part 1 is based on the erotic game by Waffle and show an anime story about Tezuka Ryou and his younger sister who lost their mother when they were kids. They lived with the father. One day his sister made suicide by jumping from the bridge to the river. Also mysterious fire in the house killed the father. Tezuka decided to find a truth about the accident with his sister. He found out that three young girls from the same class bullied his sister into committing suicide. He kidnapped them and started to torture by raping in front of live camera. The whole world is a witness.