One day, a young girl named Ichika suddenly grows a penis. It's so sensitive that she can't even go to school unless she ejaculates every morning. But on the day she overslept and couldn't masturbate, she gets molested on the train... Even at a time like this, an older man plays with her rock-hard cock, causing her to ejaculate a lot on the train. Afterwards, she is taken to the bathroom and violated in both her pussy and her penis. What's more, her junior at school, Asuka, finds out that she's a hermaphrodite and they have lesbian sex, even ejaculating female cum... The girl is overcome by the pleasure of the penis she can't resist!