Tsubasa and Masaya are a clean freak couple. One day, construction workers doing road construction in front of their house come to their house and ask to use their toilet. Masaya, who is a clean freak, refuses, but they force their way into the house and end up urinating all over the toilet. The next day, while Masaya is out, the workers come again and, enraged by Tsubasa's Tsubasa, gang rape her. At first, Tsubasa, who is a clean freak, is so disgusted that she feels nauseous, but gradually Tsubasa begins to feel pleasure from being soiled.