A fashionable, spontaneous, and fun-loving city girl who transfers to Aihara Academy after her mother remarrys. She struggles to fit into the conservative all-girls school, frequently clashes with the student council, and initially cannot stand sharing a bedroom with her new stepsister, though she eventually develops romantic feelings for her.
Step-sisters whose accidental kiss evolves into deep romantic entanglement, strained by family pressure and miscommunication.
Accidental kiss in E2, mutual yearning kiss in E7, emotional distance and unresolved tension in E10-12
Casual classmate who becomes a reliable confidante and emotional anchor during Yuzu's romantic turmoil.
Harumi invites Yuzu to amusement park in E5, supports her during arcade visit in E7
Competitive dynamic as both girls vie for Mei's attention and affection.
In episode 5, Yuzu and Himeko compete to eat lunch with Mei, both left crestfallen when Mei rejects them.
Childhood friend whose lingering affection turns to jealousy and conflict when Yuzu prioritizes Mei.
Matsuri drags Yuzu away in E8, calls her cruel; later blackmails Mei in E9
Twin sister who negotiates a temporary alliance with Yuzu to support Sara, creating indirect tension.
Yuzu promises Nina to support Sara in E12, Nina holds Yuzu back from Mei
Manipulative behavior aimed at destabilizing Mei and Yuzu's relationship through coercion.
In episode 9, Matsuri uses a secret photo to blackmail Mei into texting a stranger, disrupting Yuzu and Mei's Christmas plans.
Mysterious transfer student whose chance encounter introduces a fated romantic subplot.
Yuzu meets Sara at station in E10, Sara returns scarf in E12
Student council president whose formal authority gradually dissolves into personal emotional entanglement.
Mei is president, Yuzu is new student; interactions shift from formal to personal
Distant authority figure whose well-being indirectly impacts Mei's emotional state and family dynamics.
In episode 3, Yuzu works hard to save the chairman, indirectly pleasing Mei and easing family pressure.
New step-mother whose life decision directly triggers the central romantic conflict.
Ume announces remarriage and step-sister arrangement in E1
Explore the full interactive character relationship map of Citrus