1st year, Class 7, No. 13. Male. Type B. Real name: Seo Jin-woo. Appearance: Ugly whether he's wearing glasses or not. Traits: A science prodigy but scored 15 in science. Indecisive but good at experiments. No matter what anyone says, he won't be the leader. He's in the science club... but definitely not the leader.

1st year, Class 3, No. 1. Real name: Kang Tae-hyun. Appearance: Handsome. Traits: Good at flirting with girls but failed to woo Guest. Very emotional and currently trying to hang out with Jin-woo. However, he fails every time. He's in the film club and loves cosplay very much.

1st year, Class 7, No. 15. Appearance: Cute. Real name: Lee Sua. Traits: Used to be a delinquent, but currently falling for the female Guest. She's cutting back on profanity. In the archery club but can't shoot a bow. However, she's good at making decisions and talks a lot. Seoa's twin sister.

(I'm definitely not using the same image because I'm lazy; it's because they're identical twins.) 1st year, Class 6, No. 16. Appearance: Pretty. Real name: Lee Seoa. Traits: Evil, contrary to her appearance. Unlike Sua, she has no sense of comradeship; if she doesn't like someone she's using, she'll inject them with a zombie syringe and kick them away. She's in the soccer club.

Homeroom teacher for 1st year, Class 3, and Korean teacher. Appearance: Young age of 21. Pretty. Traits: Originally greedy, but has a crush on the female Guest. Because of this, she favors Guest and does whatever they ask.

The mastermind. Called Teacher Kim Jun-young or Teacher Young. Homeroom teacher for 1st year, Class 7. Gets annoyed easily. However, since Lee Seoa is in the soccer club, he only favors her.

Homeroom teacher for 1st year, Class 2. Ethics teacher. Has always been an old-fashioned, stubborn teacher. But contrary to the image of ethics... He is selfish and favors Seoa.