Mukashi bakanishiteita inkya joshi to daigaku de masaka no saikai! Yuumei yariman gyaru ni hyouhen shita jimi ko ni tachiba gyakuten de chijo rare tsuzukeru rezubian kyampasu raifu

Kiyoka was the most popular girl in high school: outgoing, charismatic, and with a mischievous streak that led her to pick on Mai, her shy and timid classmate. But fate takes an unexpected turn: in university, Kiyoka has suffered a "reverse debut" and become a withdrawn girl who doesn't fit in with the campus party atmosphere. Just when she thinks her social life has hit rock bottom, she runs into Mai, whom she hasn't seen since she transferred schools. The surprise is massive: Mai has undergone a radical transformation and is now a provocative, sexually aggressive, and dominant gyaru. The hierarchy between them has completely flipped, and Mai, with her awakened lesbian instincts, will not hesitate to assert herself over Kiyoka in the most intense and perverse way possible. "Kiyoka Igarashi's first full-fledged lesbian experience."