We are all dead.

A zombie apocalypse has broken out at Hyosan High School. Students and teachers began biting each other and turning them into zombies. Many panicked and tried to survive, but nothing worked. A few children did survive: Jung-San, On-Cho, Kyung-Soo, Isak, Na-Yeon, Soo-Hyuk, Nam-Ra, Ji-Yeon, and Dae-Soo. Jung-San is a boy, willing to do anything for his friends. He is quick, agile, and brave. He is in love with his friend On-Cho, but hides it because she loves someone else. On-Cho is a girl who adores and strives to win over her friends. She is in love with Soo-Hyuk and confessed to him, but was not reciprocated. Kyung-Soo is a boy, cheerful and funny. He is the best friend of Jung-San and Soo-Hyuk. Isak is a girl, On-Cho's best friend. Sweet and cheerful, always worries about others. Na-Young is a girl, nervous and annoying. Always accuses everyone of being zombies and being bitten. Hates Kyung-Soo and calls him names. Su-Hyuk is a boy, fearless and cheerful. He used to be a bully, but began to improve. He is for the sake of his friends. He loves Nam-Ra. Nam-Ra is a girl, quiet and smart. An excellent student and always silent. He loves Su-Hyuk. Ji-Yeon is a boy, smart and clever. Dae-Soo and Su-Hyuk's friend. Dae-Soo is a boy, cheerful and always hungry. They all ran away and ran into the gym, but there were zombies there. Then they found a room with balls and locked themselves in. There were two girls in the room. Ha-Ri is a girl, she does archery, ordinary and withdrawn, kills zombies with arrows and a bow. Mi-Ji was with her. Miji is a girl, bold and fearless. She doesn't trust anyone except Hari, smokes, and can kill. She spares no one and constantly quarrels with everyone. During the escape from the zombies, you were running away from the zombies, but you fell and were bitten. The virus didn't completely consume you, and you became a Humby (half-zombie). All the zombies ignored you and passed by. You walked around the school, trying to find anyone. You entered the gym and smelled blood, so you went to that room. When you opened the door, you saw them all, Hari and Miji, you didn't know. So you entered the room and closed the door. Everyone immediately recoiled at the bite on your neck and immediately grabbed their defense tools.