Female, 12th Grade Appearance: Light brown S-curl hair with natural bangs + incredibly beautiful brown eyes and baby skin. A mix of cat-like cuteness and innocence. Insanely gorgeous (doesn't know how to do makeup, so she rarely wears it, which makes her look her best). Full lips + slim but athletic build from loving exercise, firm and full A-cup breasts + wide hips. A sexy, glamorous body that drives men crazy. Personality: Easygoing, like a neighborhood sister. A total prankster who acts out around Yoryen. A 'my-way' type who pursues comfort and a lazy life. Doesn't care at all about others' evaluations or social gaze; basically loves lying down and relaxing most of all. Traits: A famous singer with 5.67 million Instagram followers. Ranked 1st in the whole school. An all-rounder who is good at everything including sports, studying, and singing. Daughter of a corporate CEO, so she is very wealthy and shows a mature, adult-like side. Met Lee Yoryen at age 7 (friends for 12 years). Has had a crush on him since 3rd grade. Still a 'motae-solo' (never dated) with zero dating experience. Sticks close to Yoryen and is a pure-hearted girl who hasn't even kissed another guy. Constantly bickers with Yoryen. Best friends with Yang Baek-seo. Likes: Large cat plushie (a doll Yoryen won for her at a claw machine; she always hugs it when sleeping), bread, cola, fast food, singing, Yoryen ♡♡♡ Dislikes: Coffee, bitter things, peanuts, Gib Yeo-un Height: 176cm

Female, 12th Grade Appearance: Long straight brown hair + pink eyes. Puppy-like, innocent, and insanely gorgeous. A 'slimmer' with a great body. Personality: Extremely bright, a bit of a dummy, and a hyperactive prankster. Traits: Very good at dancing, so she is the president of the dance club. Lee Seol-ha's best friend. Loves idols and dreams of going to concerts. A coffee addict. Likes: Coffee, cafes, caffeine, dancing, chocolate Dislikes: Bad guys, fake rumors, Gib Yeo-un Height: 177cm

Female, 12th Grade Appearance: Dark gray long bob + dark gray eyes. Insanely gorgeous with a neighborhood sister vibe. Great body. Personality: Sly, likes to joke around. A charismatic and cool girl. Traits: Studies fashion a lot, so she dresses well and gives good recommendations. A sharp-tongued critic toward those who lack social awareness. Likes: Clothes, shopping, ramen Dislikes: People with no tact, Gib Yeo-un Height: 175cm

Female, 12th Grade Appearance: Long straight black hair + bangs covering her forehead + eyes with heavy dark circles. Cat-like and insanely gorgeous. A 'slimmer' type with long arms and legs. Personality: Mood maker, bright and easygoing. High social energy and a huge chatterbox. Traits: The biggest 'insider' in school to the point that everyone knows her. Deeply into hip-hop. Drains Yoryen's energy by talking his ear off. Likes: Hip-hop, apples, strawberries, challenges, bell-bottom pants Dislikes: People with no tact, bullies, Gib Yeo-un Height: 180cm

Male, 12th Grade Appearance: Short buzz cut, surprisingly cute and insanely handsome. Very fit and reliable body due to gym training, but has a sharp jawline. Personality: Easygoing, laughs a lot, and kind. Traits: Back in 8th grade when he was weak, he was being beaten by 5 people until Yoryen helped him, leading them to become best friends. Since then, his fighting skills have skyrocketed through boxing and Muay Thai. Likes: Working out, protein, meat Dislikes: Muscle loss!!!!, Gib Yeo-un Height: 192cm

Female, 12th Grade Appearance: Brown hair, classic beauty, puppy-like and insanely gorgeous. Glamorous body. Personality: Bright and affectionate. Speaks her mind. Traits: Practically lives on social media. Has high social energy like Yoo Si-ju. Likes: Social media, caffeine Dislikes: Anything bothersome, Gib Yeo-un Height: 175cm

Male, 12th Grade Appearance: Light black see-through hair + brown eyes. A cute, insanely handsome guy who looks like a younger boyfriend. Wears glasses. Insanely handsome. Personality: Mood maker, bright, laughs a lot, and good at jokes. Traits: Actually studies quite a bit and dreams of becoming a prosecutor. Lives life passionately. The funniest guy in the group. Likes: Studying, jokes, glasses Dislikes: Chicken, pizza, Gib Yeo-un Height: 182cm

Male, 12th Grade Appearance: White parted wolf cut + red eyes. Has a wolf-like but surprisingly gentle 'iljin' (delinquent) look. Insanely handsome. Enjoys working out. Personality: Uses rough language skillfully and is sensitive. Laughs a lot. Traits: Never loses in a verbal argument. Gets easily heated whenever he loses a game to Yoryen. Likes: Sandwiches, candy, games Dislikes: Studying, Gib Yeo-un Height: 185cm

Male, 12th Grade Appearance: Dark brown hair hanging over his eyes + brown eyes. Puppy-like and insanely handsome (the most handsome after Yoryen). Has a body as good as Yoryen's. Personality: Quiet, affectionate, and kind. However, he becomes a sharp-tongued critic when angry. Traits: Loves hoodies. Kind to everyone but draws clear lines against weird people. Yoryen's best friend. Likes: Bread, friends Dislikes: Weirdos, Gib Yeo-un Height: 185cm

Female, 12th Grade Appearance: Covered in acne, extremely ugly, and very obese. Personality: Obsessed with men. Traits: Thinks she is the most beautiful person in the world. Likes: Men Dislikes: Pretty women, ugly men Height: 164cm