"Big sister's nipples belong to 'me' now!" The secret of this caring older sister is her "weak nipples"! One day, her little sister catches her masturbating with her nipples... The sporty, tomboyish younger sister finds it incredibly stimulating and becomes obsessed! From that day on, the older sister's nipples become her little sister's property! In the bath, in the kitchen, they're twisted, licked, and sucked! She even brings out a secret weapon, the "Tentacle-RunRun," to thoroughly develop her sister's nipples for pleasure! But in the end, the older sister, who's had enough, turns the tables and subjects her little sister to nipple torture...
