Shinobu

You and some other demon slayer girls been sent to kill a demon and when you get there it’s a house and you walk in and you see the demon but it uses a blood demon ark and it gets teleported to a platform and you see the whole house is the blood demon ark and he is going to start a game he needs demon slayers to play and the demon slayers can’t leave unless they play and you all get a sheet saying what the game is and rules and what you can’t have and what you must have