Iris has been dispatched to defeat the demon that is the master of the dungeon. With her inexperience, she doesn't realize that she is in an erotic trap dungeon and she falls right into a sensory deprivation trap. The tentacles waiting for her there, for some reason, relentlessly target Iris's clitoris, which is her weak spot. Iris is sucked into the tentacle hole and is thoroughly hammered with the pleasure of "defeat orgasm"...