DRPT-107 The younger sister discovers her nipples are very sensitive and teases her—the third sister with sensitive nipples—Hirose Miyu and Yura Kana—

"Kana knows, big sister has useless nipples..." The younger sister adores her older sister! Disliking being separated from her older sister who's getting married and leaving home, the younger sister secretly licks her older sister's nipples one day. The older sister, with her useless nipples, climaxes from the younger sister's tongue technique! From that day on, the younger sister constantly plays with her older sister's nipples in various situations! During a bridal beauty appointment, she licks the breasts hanging off the beauty bed from below! She obediently masturbates with her nipples in the bathroom! Even though her fiancé is nearby, she kneads her erect nipples! When there's a possibility of being discovered, the older sister's sensitivity is off the charts! But in the end, she gets revenge on her beloved older sister with a nipple scolding…