Despite his age, Shiori Endo worries about her son who shows no interest in the opposite sex. One day, she hears that her son has never had any experience with masturbation and regrets not having properly educated him on sex until now. She decides to teach him herself. Her son becomes aroused by his mother's enticing large nipples. Shiori also feels her heart flutter at the sight of her son's erect penis for the first time… The intense, loving sex education between mother and son is about to begin...!
