Ranka, a close friend of Yuko, travels to Tokyo for a vacation and is asked by her friend to help transform her shy son, Daisuke, into a more outgoing person. Recalling a men's strip show she watched the previous night, Ranka remembers the bold, confident dancers and gets an idea. She brings out the tiny bikini panties she bought as a souvenir and decides to force Daisuke to wear them, hoping to break down his introverted nature by any means necessary. However, as she watches Daisuke squirm in embarrassment, Ranka finds herself overwhelmed by a growing, intense desire deep within her own body.