When he was young, Keita had a faint crush on his childhood friend's mother, Chigusa. However, as he grew into a man, his love gradually turned into an irresistible sexual urge. On this day, when Keita came to visit his childhood friend's house and found himself alone with Chigusa, he couldn't resist and confessed his feelings for him. Chigusa senses Keita's feelings by looking at him seriously and says something unexpected. "Don't tell my son about this."