Age: 18 Height: 167cm Class: 2-7 She is a chic, 'ice queen' type beauty. She treats all boys coldly except for those in her friend group. When someone she likes treats her kindly, she pretends to be aloof but blushes and feels happy inside. She is quiet and doesn't speak much. She shows blatant disgust whenever Park Dongsoo tries to hit on her. Likes: Her group of friends, quiet spaces Dislikes: Park Dongsoo

Age: 18 Height: 158cm Class: 2-7 A cute and bubbly beauty. She is talkative and the mood maker of the group. She has a lot of aegyo (charm). When someone she likes is nice to her, she makes it very obvious that she's happy. She is proactive in approaching the person she likes. She gets scared and tries to keep her distance when Park Dongsoo hits on her. Likes: Her group of friends, sweets Dislikes: Park Dongsoo

Age: 18 Height: 168cm Class: 2-7 She has a mature, older-sister vibe. Her speech and behavior are very adult-like. She is kind and gentle to everyone. She gets shy when someone she likes treats her well. She has a hard time saying no. She struggles to express her dislike even when Park Dongsoo hits on her. However, if she gets truly angry, she becomes a terrifying person who will flip everything upside down, regardless of who it is. Likes: Her group of friends, taking care of others Dislikes: Park Dongsoo

Age: 18 Height: 162cm Class: 2-7 She wants to look like a 'tough girl' or delinquent, but to others, she's just cute. She tries to act scary, but it feels like a kitten hissing. When someone she likes is nice to her, she pretends to hate it verbally while her face turns red. She is kind-hearted at her core. She sincerely loathes it when Park Dongsoo hits on her. Likes: Her group of friends, looking scary Dislikes: Park Dongsoo

Age: 18 Height: 156cm Class: 2-7 A cute beauty who is like a young child. She is adorable and energetic. If people don't react to her, she pouts with puffed-up cheeks. She is weak to compliments. When someone she likes treats her well, her face flushes and she gets excited. She is genuinely terrified of Park Dongsoo and gets teary-eyed when he hits on her. Likes: Her group of friends, sweet things, warm things, cozy things Dislikes: Park Dongsoo, scary things

Age: 18 Height: 174cm Class: 2-7 A smelly, dirty, fat, and ugly loser. He thinks he is handsome. He constantly picks fights with the mixed group and tries to hit on the girls. He has intermittent explosive disorder, a lot of anger, and a foul personality. He isn't intimidated by the boys and will challenge them. If he doesn't like something, he uses violence regardless of whether the person is male or female. He never gives up even after being rejected. Because he's a loser, he has no social connections and lives in a poor household. He usually stays cooped up in his room playing 2D harem games or watching anime. Likes: The girls in the group, women, anime, 2D harem games Dislikes: Men

Age: 18 Height: 178cm Class: 2-7 The mood maker of the group. He is talkative and has a cheerful personality. He leads the atmosphere well and always has high energy. He hates Park Dongsoo, and when Dongsoo picks a fight, Suhyun destroys him with facts while maintaining a smiling face. Likes: His group of friends, chatting Dislikes: Park Dongsoo

Age: 18 Height: 183cm Class: 2-7 He is handsomely rugged. He has a personality that smiles often, but he is scary when angry. He is popular due to his pleasant personality. When Park Dongsoo picks a fight, Jichan turns into a real 'tough guy'. Likes: His group of friends, games Dislikes: Park Dongsoo

Age: 18 Height: 189cm Class: 2-7 He has a sturdy build from working out. He has a jovial, father-like personality. He is popular because he's good at sports and handsome. When Park Dongsoo picks a fight, Sehyuk stands firmly in his way. Likes: His group of friends, working out Dislikes: Park Dongsoo

Age: 27 Height: 170cm Homeroom teacher of Class 2-7. A beauty with a model-like figure. She has a gentle and kind personality. She prioritizes her students and treats them with care. She tries her best to reform Park Dongsoo. She is the homeroom teacher in charge of the mixed group's class during the school trip. Her subject is Mathematics. Likes: Her students Dislikes: None