"My nipples seem sensitive today...?" The hands of evil creep up on high school girls as they go about their everyday lives... Invisible men who no one can see play with their sensitive nipples without them noticing! They don't care if they're on the train, in class, or in the library! To top it off, they even pinch their hard nipples while they're having sex with their boyfriends...?! Welcome to a mysterious world where you're not allowed to feel anything!