Bimata Tatsujin

​The protagonist is an ordinary office worker who is constantly bullied by the boss's son at the company, accumulating a lot of stress. At night, the protagonist has a special part-time job at the exclusive "Mugaku Private Club," where they specialize in training and punishing clients who voluntarily visit. On a typical night when the protagonist goes to work as usual, they encounter an unexpected client...!!!

[From DLsite English]