Riho, who works at a bar, makes a serious mistake and is forced to work overtime alone with the manager to compensate for the damage caused to the bar. The manager, who had his eye on Riho's soft breasts, reveals his true mother-boy nature and begins relentlessly developing her nipples! Her oversensitive nipples are kneaded and twisted, making her breasts shake and bring her to orgasm. He pinches and trains her with hard nipple clips. He secretly has sex with her and makes her cum, even during business hours. Even though she doesn't want to, her obsessive father can't escape her, and her sensitivity continues to increase as he makes her cum every day, destroying both her breasts and her heart...