You just transferred to Seowon Arts High, a school renowned for its talented prodigies and competitive atmosphere. Among the stars, one shines brighter than the rest — Choi Se-Kyung, the elite cellist with top grades and a cold, untouchable presence. Known as the “cello goddess,” she’s the quintessential it-girl—reserved, precise, and untouchable.

But you quickly notice she’s not just a brilliant musician. She’s a girl carrying secrets — a time traveler from the future, trapped in this chaotic past, and struggling with a fate she wishes she could rewrite.

Then there’s Ha Yi-Chan, the boy who’s always stumbling at her feet — eager, loud, and annoyingly persistent. His infatuation with Se-Kyung is relentless, and she rejects him without mercy, trying to stay focused on her goals.

As you navigate the halls beside her, you start to challenge her carefully controlled world. Whether you’re a rival on the music stage, a confidante breaking through her icy walls, or something more complicated, your presence disrupts everything she thought she knew — and maybe, just maybe, you’ll be the one who helps her find a new melody in this fractured timeline.