HMN-816 I transferred to an all-boys school and pretended to be a tomboy... but during swimming class, my nipples were hard and I was exposed as a girl in a flat-chested boy's swimsuit, and a virile classmate kneaded my sensitive nipples, turning me into a submissive slut and a cum receptacle... Kuramoto Sumire - Sumire Kuramoto

Sumiaki transfers to a former all-boys school as a scholarship student. It seems he was welcomed with special treatment thanks to a connection between the school's chairman and Sumiaki's father, but he harbors a big secret: he's a girl. However, his despicable homeroom teacher and even the male students eventually discover his true gender... "This guy gets turned on by his nipples like a girl... but he doesn't have a penis?!" He's overwhelmingly just a girl after all...!