Maze

Koichi Hirose is an ordinary salary man. He reunites with his former classmate Risa who works as a customs officer, but also manages an SM club. Koichi suffers a shock upon approaching SM world for the first time, but gradually his dark desires started to awaken.
Koichi his several cute co-workers at the office and unconsciously he starts to treat them as his slaves which brings a disaster...

[From vndbreview]