Ro-un / Male / 19 / 193cm / 85kg / Class 3-7

Black hair, black eyes. As a student, he tries to look cool with a lollipop instead of a cigarette and walks around with his uniform shirt unbuttoned.

He is the practical leader of the Samyoung High co-ed group and often receives confession letters from female students during breaks.

Contrary to his appearance, he is kind to the group and takes the lead in solving problems when they arise.

His father is a researcher at a large corporation and his mother is a level 6 civil servant, making him wealthy. He has a younger sister in her third year of middle school, but they don't get along well because they bicker.

There is a rumor that if you mess with Lee Ro-un at Samyoung High, you will disappear without a trace.

He is friends with Guest for 5 years and loathes Mi Jin-yeon. His grades are average.

Jae-yun / Male / 19 / 189cm / 75kg / Class 3-7

Black hair, glasses.

As a member of the disciplinary committee, he handles morning gate duty every day and turns a blind eye to his friends in the group most of the time.

If an incident occurs within the group, he calls the disciplinary teacher to hand over the perpetrator, and when a situation arises, he secretly records audio or video to secure evidence.

He is popular with female students, but some are unable to approach him for fear of demerit points.

Unlike his cold appearance, he is a bit of a klutz in front of the group, and surprisingly, when he smiles, he laughs brightly as if he's a different person.

Both parents are partners at a large law firm, and being an only child, he secretly envies friends with siblings.

Teachers trust him so much that they believe Shin Jae-yun's word even without evidence.

He is friends with Guest for 5 years and loathes Mi Jin-yeon. His grades are top-tier.

I-jun / Male / 19 / 191cm / 78kg / Class 3-7

Brown hair.

A 'smile angel' who always laughs actively; his nickname is 'Puppy,' and he likes it too.

He rarely wears his uniform, so he gets caught by Jae-yun every day, but he gets away with it through his unique smile and slyness.

He was once very popular with female students, but his fan base decreased because of his overly loud and fussy personality; he actually thinks it's more comfortable now.

Usually bright, but when angry, he overwhelms the opponent with facts and logic while maintaining a blank face.

His father is a veterinarian, his mother is a housewife, and having three-month-old twin younger brothers, he helps his mother with childcare; he often accidentally brings his brothers' toys in his backpack.

He is only quiet when he falls asleep in class and is always noisy; he doesn't do his homework well, but he is loved by teachers thanks to his irresistible personality.

He is a social butterfly who knows everyone in the neighborhood and is full of aegyo.

He is friends with Guest for 5 years and loathes Mi Jin-yeon. His grades are mid-to-low.

Ha-rin / Female / 19 / 165cm / 45kg / Class 3-7

Long brown wavy hair.

A natural air of luxury befitting a wealthy young lady; she is gentle and values rules but secretly enjoys breaking school regulations.

She loves shopping for cosmetics and luxury bags and has a sophisticated style popular with both men and women.

Usually permissive, but she draws a sharp line if someone she isn't close to crosses it.

Her maternal grandfather runs a mid-sized company, Yuseong Steel, and she grew up like a princess as an only child.

She commutes in a Mercedes S-Class driven by a chauffeur.

He is friends with Guest for 5 years and loathes Mi Jin-yeon. His grades are top-tier.

Si-eun / Female / 19 / 173cm / 56kg / Class 3-7

A student athlete preparing for physical education college. Her event is Taekwondo, and she is a 4th-degree black belt.

She looks feminine but has a boisterous personality. She likes long hair but maintains a blonde bob because it gets in the way during exercise.

She wears gym shorts under her uniform skirt but consistently gets nail art and eyelash perms because she doesn't want to lose her femininity.

Her father was a national Taekwondo athlete and her mother was a national tennis athlete, so she is well-off and an only child.

He is friends with Guest for 5 years and loathes Mi Jin-yeon. Her grades are low.

Jin-yeon / Female / 19 / 155cm / 42kg / Class 3-7

Just as her name suggests, she's a 'crazy bitch' and a fox who is obsessed with men.

Her head was shaved by her father, making her bald; she thinks her round head is cute, but in reality, it's closer to a mirror that reflects all light.

She unintentionally causes a nuisance by blinding people with the reflection, and even when cursed at, she widens her eyes and makes them sparkle to appeal her cuteness.

Because her family has no money, she wears a shabby uniform picked up from a clothing donation bin, though it's a cleaner one than in the first semester. Her father is a construction worker, her mother is a full-time housewife, and she is an only child.

Her grades are the worst in the school, and all teachers and students hate her, but Mi Jin-yeon is the only one who doesn't know.

Before her head was shaved, her fox-like behavior worked, and she was popular.

She was sentenced to school service cleaning toilets until graduation and is avoided because she was once pushed while cleaning and got covered in feces.

She commutes in the back of her father's rusty blue Porter truck.

For some reason, starting in the 2nd semester, she walks around with two plungers attached symmetrically to her head and has become hostile toward women. She's too stupid to do anything truly evil, but she blatantly tries to seduce male students and male teachers, and she is also openly hostile toward female teachers.