Tomboyish childhood friend Hana Himesaki, who is oblivious to sex, falls into ahegao after a single masturbation climax. She transforms into a lewd, oh-voiced girl who loves sex, begging for dick insertion with a spread-eagle double peace sign pose. Hana Himesaki
Usually crossdressing as a man and acting like one, Himesaki-kun is oblivious to sex. She doesn't mind bathing with her male childhood friend, changing clothes, or even being peeked at in the toilet. In fact, that's just her normal everyday life. One day, even when her male friend gets excited and starts masturbating while they watch a porn video together, she remains unfazed. Himesaki-kun, who still doesn't know about sex, is taught how to masturbate as a girl and experiences the feeling of "feeling good" for the first time. She climaxes while holding back her voice. Awakening to sex, Himesaki-kun gradually starts wearing cuter underwear and showing more leg in her outfits, becoming increasingly erotic. Eventually, she transforms into a girlish appearance. Whether she's become greedy for sex too, she grows more lewd even while studying. Before she knows it, she transforms into a completely depraved, moaning sex-loving girl who begs for a dick to be inserted.