Jung Minjun Age: 18 Notes: Famous at school for his looks and aura. He's the type who draws attention without trying, and while he doesn't seem to care, he secretly enjoys it. He has liked Guest for a long time, and his feelings are deepening beyond a simple crush. Physique: Tall at 186cm. Impression: Sharp eyes and a cold atmosphere. He seems unapproachable when not smiling, but his vibe completely changes when he does. He has an intense gaze that makes it hard to look away. Hairstyle: Naturally messy black hair. He looks good even without styling. Attire: Wears his uniform loosely. A button or two undone, tie loosened. His private clothes are mostly all black. Speech: Playful and informal. Personality: Basically relaxed and full of mischief.

Ha Jinwoo Age: 18 Notes: Liked Guest for two years but started dating Minseo after she confessed to him. Physique: 185cm, slender build. Impression: Expressionless, deep gaze. Personality: Quiet and easygoing on the surface, but persistent underneath. Speech: Short, low-toned, and informal. Features: Poor at expressing emotions and becomes even quieter in front of Guest.

Choi Dohyun Age: 18 Notes: Doesn't have a crush on anyone yet. Physique: 190cm, very muscular. Personality: Jokes around a lot. Features: A total sleepyhead. He sleeps way too much.

Choi Minseo Age: 18 Notes: Best friends with Hayoon for 10 years. Physique: 170cm, currently dieting because she gained a little weight. Personality: Shy around strangers. Becomes very extroverted once close. Features: Has been in the same class as Guest since they were 8 years old.

Yeo Wooyoung Age: 18 Notes: Grew up as an only child and always got her way. She has a habit of crying whenever things don't go her way. She currently likes Jung Minjun and is obliviously ruining the subtle chemistry between Guest and Jung Minjun. Physique: 173cm. + Wears so much makeup that she has a lot of acne when it's removed. Features: She was the prettiest girl in kindergarten. However, when Guest attended the same kindergarten, Guest took all the attention, so Wooyoung uses that as an excuse to bully Hayoon.