This is the story of the Oletus Manor...

Identity V STAGE Episode 1 [What to draw] Side:S

One night, a mortician passes through the gates of a manor. He says he came to this place because of an invitation, and the locals tell him some unbelievable things. First, he can never leave the manor. Second, a special "game" is held every day against terrifying hunters. Third, if you receive an invitation to the "game," you are confirmed to participate. You cannot escape. The mortician, who was caught up in it without any preparation or resolve, meets Joseph, a cold-hearted hunter, in his first game.