Fumi Manjoume enters Kamakura's accelerated high school - Matsuoka All-Girls High School. While waiting at the Kamakura station on the day of her entrance ceremony, she runs into an old childhood friend whom she had not seen in 10 years: Akira Okudaira. As their friendship is rekindled and they start falling back into the rhythm of friends again, it starts a delicate love story. Yuzu, a high school gyaru who hasn't experienced her first love yet, transfers to an all-girls school after her mother remarries. She's beyond upset that she can't land a boyfriend at her new school. Then, on her first day, she meets the beautiful black-haired student council president Mei in the worst way possible. What's more, she later finds out that Mei is her new step-sister, and they'll be living under the same roof! And so the love affair between two polar opposite high school girls who find themselves drawn to one another begins!