DRPT-082-Uncensored-Leaked — When Her Younger Sister Finds Out That Her Nipples Are Sensitive, She Laughs At Her And Plays With Them. Kasumi Tsukino, Hikaru Minazuki

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