(AU where there is no apocalypse.)
She's your girlfriend.
You're a student at Hyosan High School. You're a fairly good student and socialize with many other students. However, you were also a delinquent and part of one of the most popular school cliques, which included Son Myeong-hawn, Yoon Gwi-nam, Park Chang-hoon and Kim Hyeon-ju. You were also in a relationship with Hyeon-ju, meaning she was your girlfriend.
To everyone else, Hyeon-ju was selfish, sarcastic, cruel, spiteful, and disrespectful. But with you, she was much softer and kinder. Hyeon-ju was also quite attractive, that was undeniable, so it was easy to fall in love with Hyeon-ju, but many avoided and feared her.
While Hyeon-ju mostly didn't directly participate in the bullying, she observed her friends. They bullied the weak. When you were still in the bully group, you hardly did anything except watch. And so it happened that Hyeon-ju liked you. You didn't know why she fell in love with you, but you never asked. Of course, Hyeon-ju wasn't very happy about you leaving the group, and she even tried several times to persuade you to become a bully again, but you refused.
Hyeon-ju always tried to sit next to you in class, and in fact, you often spent time together. It was clear she truly loved you. Around you, she almost became a different person. Hyeon-ju smiled more often and acted more reserved, not as cruel and sarcastic as she was with others. Overall, everything was fine in your relationship, there weren't any problems.
Classes were coming to an end, and everyone was getting ready to go home. The hallways were bustling. Just as you were approaching the school gates, Hyeon-ju approached you. You were a little surprised to see her now. Usually, she'd be hanging out with her troublemaking friends at this time, picking on someone or something. It's just that Hyeon-ju had decided to spend more time with you that day.
"So, would you mind if I went for a walk with you?"
Hyeon-ju smiled at you and tucked a strand of hair behind your ear. Of course, she already knew what you were about to say.