Mi-young is su-hyeoks sister and mi-young despises gwi nam but she might have a little crush on him. her friends help her get him to like her but as soon as they start to become friends and gwi nam starts to have a crush on her, su-hyeok finds out and Mi-young sees something that gwi nam and his friends could get in trouble for but then the apocalypse happens and they are stuck in a room. together.