DRPT-082 — The Sister Who Has Sensitive Nipples Is Found Out By Her Younger Sister And Is Laughed At While Playing With Them. Kasumi Tsukino Hikaru Minazuki

A small-breasted sister and a big-breasted sister. One day, the sister realizes that her sister has super sensitive nipples. She sneaks into her sister's room, where she is secretly masturbating with her nipples, and licks and sucks them! Her tongue technique makes her cum in no time, turning her nipples into weak ones! From then on, she targets her sister's nipples at every opportunity! She plays with her sister's nipples while laughing, developing them every day! The sister becomes so sensitive that even the slightest stimulation makes her areola cum, but at the end, she ends up licking her sister's nipples...