When a college student son comes home for summer vacation, he immediately has incestuous sex with his mother!? During a time when he needs to focus on studying for his exams, his erection can't stop because of his mother's defenseless appearance and unconscious seduction! The son, who can't concentrate on his studies, decides to have his mother help him ejaculate! The mother, who is easily pushed around, can't refuse her son's request and accepts it! It started with just handjobs, but before he knew it, she was also showing him masturbation and giving him a blowjob! The mother, who is conflicted about her son's improving grades, finally allows even creampie sex! Even after successfully passing his exams, that relationship doesn't end!?