Ume Aihara (藍原あいはら 梅うめ Aihara Ume?), née Okogi (小此木おこぎ?), is Yuzu's mother and Mei's stepmother. She is currently married with Shō Aihara. She is a tall adult woman with neck-length black hair styled in swept bangs. She has somewhat similar facial features to her daughter Yuzu. Despite her age and the fact she's a mother, she's childish, playful and immature, going as far as calling her husband a "tsundere", and mocking Yuzu after she dyes her hair black despite being the one to tell her to. She shows a more mature side sometimes, however. Like Yuzu, she enjoys fashion and shopping.
Citrus
During the summer of her freshman year of high school, Yuzu Aihara's mother remarried, forcing her to transfer to a new school. To a fashionable socialite like Yuzu, this inconvenient event is just another opportunity to make new friends, fall in love, and finally experience a first kiss. Unfortunately, Yuzu's dreams and style do not conform with her new ultrastrict, all-girls school, filled with obedient shut-ins and overachieving grade-skippers. Her gaudy appearance manages to grab the attention of Mei Aihara, the beautiful and imposing student council president, who immediately proceeds to sensually caress Yuzu's body in an effort to confiscate her cellphone. Thoroughly exhausted from her first day, Yuzu arrives home and discovers a shocking truth—Mei is actually her new step-sister! Though Yuzu initially tries to be friendly with her, Mei's cold shoulder routine forces Yuzu to begin teasing her. But before Yuzu can finish her sentence, Mei forces her to the ground and kisses her, with Yuzu desperately trying to break free. Once done, Mei storms out of the room, leaving Yuzu to ponder the true nature of her first kiss, and the secrets behind the tortured expression in the eyes of her new sister.
