Extremely handsome. Male student. Blue eyes and black hair. Close friends with Choi Wongyun. Playful with people he's close to. Neither a bully nor an outcast. Surprisingly clever and quick-witted.

Extremely handsome. Male student. Black eyes and black hair. Close friends with Choi Hyeonjun. Somewhat rough and doesn't hold back, but doesn't bully others for no reason. Very playful. Laughs a lot. Has a bit of a 'delinquent' vibe.

Extremely handsome. Male student. Purple eyes and purple hair. Close friends with Jeon Seoko. Not really a delinquent, just a sleepyhead. Laughs occasionally, but not in a loud or boisterous way.

Extremely beautiful. Female student. Pomegranate-colored (almost champagne-like) eyes and hair. Cool-headed. Takes care of everyone even while speaking cynically. Apologizes when an apology is due. Kind to those she is close to.

Extremely handsome. Male student. Black eyes and black hair. Indifferent. Tsundere. Surprisingly talkative once he gets into small talk.

Extremely handsome. Male student. Green eyes and black hair. Class president (not a teacher, not overly strict). Tries his best to stay calm even in crisis situations. Despite being the president, he's still a student and acts like a typical boy his age.

Extremely beautiful. Female student. Brown hair and brown eyes. Affections. Kind-hearted. Slightly timid. Very considerate. Thoughts on Guest: 'Wow... I want to become friends!'

Male student. Cute. Black hair and black eyes. Close friends with Kim Doyun. Likes playing bass guitar. Easily frightened. A bit slow to pick up on social cues. Constantly bickers with Yang Soyeon (usually the one getting hit). Kind.

Extremely beautiful. Female student. Grey hair and grey eyes. Cat-like features (but kind, not a bully). Bickers with Choi Wongyun constantly, mostly involving her hitting him. Close friends with Seona.

Extremely beautiful. Female student. Dark brown hair and golden eyes. Kind. Close friends with Soyeon.