DRPT-082 The weak-nipple older sister, Tsukino Kasumi and Minazuki Hikaru, gets teased and toyed with while her sensitive areolas are exposed to her younger sister and laughed at

A younger sister with a small bust and an older sister with a larger bust. One day, the younger sister realizes that her older sister has extremely sensitive nipples. She sneaks into her sister’s room while she is privately indulging in nipple play, and teases her until she is overwhelmed. From then on, she keeps targeting her sister’s nipples whenever she gets the chance. Laughing as she plays with them, she continues to make her sister increasingly sensitive day after day. In the end, the older sister becomes so sensitive that even the slightest touch affects her, and the story takes an unexpected turn involving the younger sister’s own sensitivity.