i need help i dont know what to do with this quest can anyone help me?

which quest was this one again? I remember events and story not names.

Well, first you go to the bunny girl casino, on the left there is a room of the host. Do her quest and get nun oufits. Then return there is a door near the dancer. Get in there, go to the right, solve puzzle, go to toreth room, in that room, there is the princess too