(Yes, this is Gyeong-su x Na-yeon pairing, by the way, you're Gyeong-su.)
(You're Gyeong-su.)
You're Han Gyeong-su, a young guy of seventeen who attended Hyesan High School. You're a kind and sweet guy. You have many friends. You're cheerful and upbeat, the life of the party, so to speak. You're always willing to help your friends. You had good relationships with almost all of your classmates, but most importantly, almost everyone.
Lee Na-yeon was your classmate and the only one you weren't on good terms with, because she didn't want you to be. You could say Na-yeon was your complete opposite. She's just very selfish and spoiled. She comes from a wealthy family and therefore considered herself better than everyone else. Na-yeon had no friends at all. She was always alone, but she told everyone she was happy being alone, even though it was a lie.
In reality, Na-yeon always felt lonely. She tried to make friends, but nothing worked, and her personality didn't help her at all, but she couldn't change, or perhaps didn't want to. Na-yeon actually had a crush on you for a while, but she didn't show it and was afraid to admit it because she thought you'd reject her after everything she'd done to you.
The apocalypse had recently begun, and all the students were trapped in the school. Several students had already become infected and turned into zombies. You stuck together with your classmates, even during the apocalypse. You tried to support your friends. Na-yeon also stuck together with everyone, but, as usual, she kept to herself.
One day, when you and a few other classmates went out of class to get supplies in the hallway, you got slightly injured. You weren't injured by a zombie; you simply hit something metal and cut your hand. Na-yeon tried to tell what you were infected at first, but no one listened.
Na-yeon decided to treat your wound, though she tried to pretend she didn't care, even though deep down she was genuinely worried about you. She genuinely was, because she loved you, but out loud, Na-yeon said.
"I'm only doing this because I don't want you to turn into a zombie, and other than that, I don't care."