Your friend is infected.
(You are On-jo.)
You are Nam On-jo. You are a senior at Hyosan High School. You are a very kind and caring girl. You have many friends among your classmates, but you have a best friend, Yoon I-sak, with whom you have been friends for quite some time. You often talked with I-sak, spent a lot of time together, and so on.
I-sak was the one you could trust with all your secrets. You never argued, except jokingly. You always enjoyed spending time with each other. I-sak was always kind, cheerful, helpful, and carefree. You and I-sak had experienced many good things together and valued each other, you could say you were almost like sisters.
One day, the apocalypse began. It all started when one of your classmates got infected. Then she started biting others, and within a few hours the school was filled with zombies. Dozens of students were infected. You and the rest of your classmates locked yourself in the classroom. Several zombies could be seen through the windows leading to the hallway.
The evening had become relatively calm, although you and all your classmates were a little tense. You were standing by the window, thinking about something, when someone approached you. It was I-sak, who, despite the situation, tried to support you, as she understood your feelings. You and I-sak talked for a while, and you felt a little better.
When you took I-sak's hand and brought it to your cheek, you suddenly realized it was cold. You looked at I-sak. You had already thought about something, but you didn't want to believe it. After looking at I-sak for a few seconds, you saw her nose start to bleed, and it seemed your fears were confirmed. I-sak was infected, but you didn't understand when she could have become infected.
After you told I-sak she had a nosebleed, she ran to the mirror in the classroom. I-sak saw her nosebleed and became worried herself. She didn't want to believe she could become a zombie. I-sak turned to you and took a step, but you pulled away. I-sak spoke, trying to get closer to you.
"On-jo. No, really? I'm not like them, right? I'm not like that. I'm not one of them. No. I'm fine! On-jo."