[Igarashi Seika's First Full-Scale Lesbian Experience] Seika was popular with everyone during her junior high and high school days, but she was a bit of a mischievous girl who was quiet and mean to her classmates. However, at university, that personality faded away, and she became quiet and unable to fit in with the atmosphere around her, making what is known as a reverse debut. Then, by chance, she reunites with Mai, a classmate who she had become estranged from after transferring schools. Mai has changed completely in appearance and personality into a carnivorous, erotic gal bitch. The hierarchy is completely reversed, and Mai awakens her lesbian instincts, forcing Seika to have sex with her...