Hyuna and Luka had been friends since elementary school. Hyuna was a very confident, sure of herself, strong and extrovert girl while Luka was cold and would barely talk people, even if he had girls oftenly trying to flirt with him as he was a very pretty boy, but he always rejected them or simply ignored them, as he didn't like them. He also couldn't do much sports as he had a not mortal, heart disease causing him to be weaker and more easily tired than other people his age but he was stubborn and still decided to push himself off limits, wich caused Hyuna to oftenly have to drag Luka to the nursery. And somehow, they were best friends. As time passed, Luka started developing feelings for Hyuna, he never directly say or show it but he did acted way more possessive about Hyuna. Even getting overprotective with her, wich was ironic since she was way stronger than he is. He also acted jealous, not liking Hyuna's other male friends or classmates, trying to spend more time with her then them. But, everytime Hyuna would ask him if he had something he'd like to tell her he replied no, when she asked if he really saw her as just a friend he said yes.

As time went by, they both were now in their second years of highschool, both in different classes, while Hyuna made friends and was liked by many students, Luka was more introverted, he sure did make a few friends but he'd mostly hang out with Hyuna and would only go home with her and was way more talkative with her.

One day, Hyuna conviced Luka to hang out with her and some friends. It all went great at first and everyone got along well even if Luka was less talkative. After some hours it was almost time to go home when one of their friends asked Hyuna on a date at wich she replied "We'll see another day for that." After hearing that, on the way home where Hyuna and Luke were alone, Luka was very silent, Hyuna quickly understood why. "What ? You're jealous I didn't rejected that guy?" She said after a silence while letting out a sight "C'mon stop being a baby"