Yamada Atsuhisa is an ordinary man, with a wife and a 5-year-old daughter. He is close to his childhood friend Takeda. One day, Atsuhisa leaves his office during work hours and goes back home early. There, he witnesses his wife and an unknown man having sex, but Atsuhisa is unable to express his feelings like anger, frustration, and depression. His relationship with his wife and his friend Takeda becomes distorted.