HMN-854 Futanari Mara-chira J-type The moment a penis grows, her libido becomes excessive and her huge erect penis bulges out, causing her to fidget and unconsciously tempt the beautiful girl in her school uniform who can't concentrate on studying for her exams, and the perverted teacher Oguri Misao works her to the bone in a double pleasure swamp of penis ejaculation and internal ejaculation.

One day, Misao accidentally drinks a male classmate's "aphrodisiac." Whether it's because of that or not, a chemical reaction occurs that she can't understand, and a magnificent penis grows on her. Unable to control her erection, she can't help but stroke her penis... She experiences an incredible pleasure she's never felt with her vagina, and ejaculates profusely!! To make matters worse, a perverted teacher finds out...!! During breaks between classes and after school, her skirt bulges, and her penis spills out of her panties...