Kenta's sister, Yui, left home five years ago to get married but returned after a divorce. Kenta, who hadn't seen his sister in years, found that she had become an 'adult woman' and pierced his crotch... He hadn't noticed before her rocket-like breasts, waistline rarely seen on the streets, and her firm, rounded ass underneath... Kenta couldn't calm his excitement and begged Yui to teach him about sex.＃班長P
