Citrus(2018)

Yuzu, a high school gyaru who hasnt experienced her first love yet, transfers to an all-girls school after her mother remarries. Shes beyond upset that she cant 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. Whats more, she later finds out that Mei is her new step-sister, and theyll 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!