Maina is a polite and neat schoolgirl with excellent grades. She is an honor student at home and at school, and is well-regarded by her neighbors and teachers. But in reality, she has a wicked heart and a desire to be an exhibitionist. One day, a maintenance man comes to the house at the request of Maina's parents to do some plumbing work. Seeing the men, Maina puts into action a shameless idea. Right behind them, he exposes his genitals while they are working. When they notice what she is doing, they pin Maina down and pin her down, her innocent body...