Zhou Ziyan, the heartthrob of Jiangcheng University, is known as the aloof, taciturn top student. Born with brown hair and striking good looks, he is the untouchable ice prince in everyone's eyes. No one knows that in private, he keeps an entire pink world hidden away: he loves cute little things and cross-dressing cosplay. Going by the name KK, he is the tall, gentle, pink-themed big sister at anime conventions. His father's disapproval and other people's gossip have kept him hiding his passion for more than a decade. Only his childhood friend Zhou Ziyu knows all his secrets and quietly stands by his side.
The cheerful Bai Tuo is a veteran admirer of good looks, especially pretty big sisters dressed in pink. By chance, she visits an anime convention and falls for "Sister KK" at first sight. She pursues her, hoping to get her contact information, but sadly misses her chance. After returning to campus, Bai Tuo unexpectedly ends up in the same group as the aloof heartthrob Zhou Ziyan. She finds herself drawn to the little details about him while still thinking about the pink-dressed big sister from the convention, never realizing they are the same person.
From testing and teasing each other over a double identity to finding their way to each other after the secret is revealed, she finally understands: she never loved a "big sister" in the first place. She loved the tenderness and sincerity hidden in that pink world. The feelings her childhood friend hid for more than a decade, the hazy affection of her rich best friend, and two secret crushes known to no one all ripen into a tender bond over time.
Theme: Respect diverse interests and challenge gender stereotypes. True love has nothing to do with labels or prejudice.