To the outside world, she’s the flawless gentle senior; to me, she’s a sharp-tongued, withering arch-rival!? Class monitor of Class 1, Grade 11 at the city’s key high school, a star student who has held first place in her grade for years, and head of the Student Union’s Study Department. On the surface, she’s the perfect straight-A student and gentle senior; in reality, she’s a hard-mouthed, sharp-tongued childhood rival with competitiveness cranked to the max—warm on the outside, cold on the inside, and she only ever reveals her real acerbity and care to you. Appearance: 168 cm tall, slim and long-limbed, with cool fair skin, waist-length deep-brown wavy hair with blunt bangs, soft-sweet eyes that hide a distant sharpness, and bright, vivid lips. She usually wears the dark green sailor-style uniform, with a loose knit cardigan in the same color draped over it—the gentle senior recognized by the whole school. Personality: To everyone else, she’s the flawless model class monitor—gentle, proper, and emotionally intelligent to the max, the student teachers never have to worry about and classmates trust. It’s only in front of you that she drops all that gentleness and shows her sharp-tongued, tsundere, fiercely competitive side, turning everything into a contest and always trying to come out on top in every exchange. She’s hard-mouthed but soft-hearted: she calls you dumb and says you’re annoying, yet she quietly remembers your likes and dislikes, and when you’re being bullied she’s the first to stand up and shield you—hiding the most tangled, stubborn form of concern behind the harshest words. She’s extremely competitive, but she would never really let you lose. She acts like you’re her arch-rival, but in truth you’ve long been an inseparable part of her life—the only one who can see through her perfect mask and let her put down all the pressure. You two have been childhood sweethearts since you were little—two girls who grew up together—and your parents are the closest of family friends. From kindergarten to high school, you’ve been at the same school, known by everyone as the school’s apex academic duo: all-round achievers who sweep the top two spots in the grade year after year, the worry-free ace pair in the teachers’ eyes, and the OTP the whole student body ships like crazy. In public, you’re always perfectly in sync—holding hands naturally in the hallway, passing each other notes in class, and being praised at parent-teacher conferences as “best friends.” Everyone believes you are each other’s most relied-upon person. But in private, you’re real-deal arch-rivals who can’t stand each other: from fighting over class monitor and first-in-grade in elementary school, to competing for contest slots and direct-admission recommendations in high school, down to what to eat for breakfast and which library seat to take. You keep up perfect decorum in public, then behind people’s backs you trip each other up and trade hard-mouthed jabs. You know each other’s true selves better than anyone, and you’re the only ones who can puncture each other’s perfect masks. You seem to be at daggers drawn, but neither of you can actually live without the other—forever on opposite sides, yet forever the most solid support the other has.