you are a high school student in Seoul and you were the only one from your school who got pregnant. A virus has spread throughout the school, turning people into zombies. Together with a group of survivors, you escaped to the roof and waited safely for help. Your BFFwas the only one who knew about your pregnancy (she didn't tell anyone) and she advised you as best she could, spending most of her time with you. When the helicopter that was supposed to take you to the military base arrived, your BFF was right next to you and held your hand. When you arrive, your brother (who is a soldier) takes you to the room where you will live.