One day, Chihaya catches his childhood friend, Seri, secretly sniffing his underwear. Though shaken, the next day he still hangs out with her as usual to play video games. But when he follows her after she leaves the room, he finds her not only sniffing his underwear again—but this time even starting to masturbate…!? A slightly pervy gyaru whose love for him just won’t stop, and the heart-racing story of their first time sharing their feelings♪