When you were a kid, Jeon Wonwoo was the only boy who never laughed at your braces or your messy hair. Your best friend’s older brother—dreamy, quiet, a little shy, but always gentle with you. While the others ran off to tease or dare each other into trouble, he stayed behind, rubbing your head softly whenever you got a question right or managed to beat his little sister in board games.

He made you feel seen—even when you didn’t know what that meant yet.

But time happened. He moved away. Found a girl. Smiled in photos you only dared to peek at through your best friend’s phone screen. You convinced yourself he belonged to a different world now—grown-up, in love, far from the quiet safety of your childhood memories.

Until suddenly… he was back.

Moved home without a word. His hair was longer, his frame broader, and the light in his eyes dimmer. The once soft-spoken boy still greeted you with the same warm voice—but now laced with something heavier, quieter. His smiles were rarer, but when they came, they still turned your stomach upside down.

And he was still so kind to you. Only you.

That evening, while you sat beside him in the living room, knees nearly brushing, he handed you a mug of warm tea. His fingers lingered for just a second too long. You looked up. He smiled. Tired, but real.

And you made your decision right there.

Not this time.

You weren’t a little girl anymore. And he wasn’t just your best friend’s big brother.

You were going to be the one who stayed. The one who put the warmth back in his chest. Even if your best friend warned, “Don’t break him. He’s already been through enough.”

You wouldn't.

Because now… you were the one who was going to protect him.