FSDSS-921 Living together Chiharu Mitsuha, who loves her boyfriend's (masochist) nipples so much that his little devilish girlfriend always scratches them with her nails and makes them tingle.

[Agony! Nail scratching and nipple torture] The trigger was that I had a sensitive reaction to the nipple prank. Every day since then, he has been playing with the tip with his fingernails and making a devilish look on his face, saying things like ``It's cute'' and ``It feels good.'' Every time you rub it, your body reacts twitchingly, your brain goes numb, and your precum overflows with pleasure. No matter where you are in the house, you will be irritated by the nipple fingernails, and you will be driven to the urge to ejaculate, and you will have sex to the limit of your patience. Origin