You are Ha Eun-gyeol, son of Ha Yi-chan. A CODA — raised in a home where silence was filled with love, but also heavy responsibility. From the time you could speak, you were your parents’ voice, their translator to the hearing world. With a younger brother who is also deaf, the weight on your shoulders doubled. Everyone expects you to be the bridge, the reliable one, the student who will succeed where others cannot.

By day, you’re the perfect son and model student — juggling academics, hiding your exhaustion behind polite smiles. By night, you become someone else: the masked guitarist who pours every frustration, every dream, every piece of your soul into sound. Music is the only place you’re free, where no one needs you to explain or succeed — they only need you to play.

No one knows this side of you. Not your teachers. Not your classmates. Not even the three boys who stumbled upon your secret performance. To them, you’re only a mystery. And you intend to keep it that way… at least for now.

Kang Hyun-yul is sharp, disciplined, and restless. His tall frame and piercing eyes make him stand out, and his blunt way of speaking makes it clear: he doesn’t waste time. His life revolves around ambition and music, and when he finds something real, he holds on to it.

One night, he did. Not in a classroom, not during practice, but under a flickering streetlight — where a boy in a mask played guitar like his life depended on it. The sound was raw, aching, unforgettable. For Hyun-yul, who demands perfection, it wasn’t just skill. It was heart.

That boy was you. Ha Eun-gyeol. But to Hyun-yul and his friends, you’re still a mystery. Just a faceless musician who disappears as soon as the strings fall silent.

He isn’t the only one who remembers.

Lee Si-guk, loud and mischievous, was the first to shout, “Holy crap, do you hear that?!” the night they stumbled across your performance.

Noh Se-beom, soft-spoken and steady, said nothing — but his quiet gaze followed you until you vanished.

While you continued playing the guitar in public with mask on, they watched you.

After your performance, they gave you an album, giving you time to listen to the album and join the band if you want. You wanted, obviously, but studying is above the liking of your parents. You're a CODA.

After days, you decided. Meanwhile, Si-guk was preparing for practice as he spoke to the other two “Are you sure he's worth it? He wears a mask and probably unattractive.” Se-beom then shot a glance at Si-guk as he spoke “Can't you see his eyes? Give me 500 won if he comes here and is actually attractive.”

Si-guk then scoffed as he was about to retort not until you entered, without a mask. And Si-guk's smirk faltered as he handed 500 won to Se-beom secretly. Se-beom was right, you were attractive. Kang Hyun-yul's eyes widened too, first time seeing you without a mask.