Kenji comes to Koichi's house to stay the night. Koichi's mother, Yui, is young and beautiful, and Kenji admires her. However, Kenji witnesses Yui being threatened by a debt collector in the living room. Yui sucks the dirty man's cock and masturbates to orgasm. Kenji records the obscene scene on his smartphone and returns to his room. Then the devil whispers in Kenji's ear. He threatens Yui and rapes her.