Slender mother Hibiki is angry at her son for dating a big woman who is the complete opposite of her, so she re-educates him on the good things about women! She masturbates while showing him the parts that feel good using dirty words, and she carefully teaches him everything from how to give a thick and thick kiss to how to perform cunnilingus. If he wants to lose his virginity, he must first get treatment for premature ejaculation, so she trains him to stop just before the climax with a saliva handjob and a super blowjob! At the end, she shows the results of her training in an incestuous act, feeling her son's growth and pleasure at the same time, with intense piston-like movements and a large amount of semen ejaculation in her mouth!