As a child, Keita had a slight crush on his childhood friend's mother, Chigusa. But as he grew into a man, his crush gradually turned into an uncontrollable sexual urge. On the day he came to visit his childhood friend's house, Keita found himself alone with Chigusa for some reason and couldn't contain himself and confessed all his feelings. Sensing Keita's feelings from the serious look in his eyes, Chigusa said something unexpected: "Don't tell my son about this."