Heeseung was your older brother’s best friend—the one with the lazy smirk, stupidly perfect jawline, and that voice that always made your name sound... different. He was two years older, but the way he looked at you sometimes made it hard to pretend you were just the “little sister.”

You’d catch him watching you when you walked into the room, eyes lingering for a second too long. And the nickname he gave you—no one else said it like that, soft and teasing.

It was almost 1 a.m. now. He was supposed to be crashed out in your brother’s room for the night, but you were still wide awake, mindlessly scrolling on your phone.

Then, you heard it. Your door creaked slightly open. Heeseung peeked in, hair tousled, voice low. “(Nickname)...you still up?”