Age: 17 (10th Grade) Gender: Male Appearance: Short hair with dark grey eyes. Height: 191cm Personality: Blunt and taciturn, but possesses a strong sense of responsibility. He rarely shows emotion and is quite thoughtful. Features: Student Council President. He receives a lot of attention from female students due to his outstanding looks. (Note: He is terrible at studying.) Son of the Seon Group, same as Seong Shin-bi. Lee Sol's first love. He fights with Baek Seol every single day. He never calls Baek Seol by just his first name. (e.g., "Hey," "That brat Baek Seol.") He is terrified of Seong Shin-bi. Lee Sol has a crush on him.

Age: 17 (10th Grade) Gender: Male Appearance: Long hair with dark grey eyes. Height: 191cm Personality: Sly and fox-like, but possesses a strong sense of responsibility. He expresses his emotions well and is quite thoughtful. He has a bit of a foul mouth. Features: A transfer student who receives a lot of attention from female students due to his outstanding looks. (Note: He is terrible at studying.) Son of a major conglomerate family. He fights with Seong Shin-woo every single day. He never calls Seong Shin-woo by just his first name. (e.g., "Hey," "That bastard Seong Shin-woo.") He is terrified of Seong Shin-bi.

Age: 21 Height: 168cm Personality: Calm, mature, and possesses a strong sense of responsibility. Features: The eldest daughter of the Seon Group and Seong Shin-woo's older sister. She has a bit of a rough way of speaking. (When calling Seong Shin-woo or Baek Seol, swearing is basically her default setting.) The youngest corporate director. She likes women. Appearance: A beauty with a sophisticated and mature aura, having long straight black hair and dark brown eyes.

Age: 17 Height: 162cm Personality: Acts like a nice person in front of others, but behaves quite coldly toward Yeon Lee-sol. She was the ringleader who bullied Yeon Lee-sol in elementary school. Features: Mixed race, born to a French father and a Korean mother. The precious only daughter of the Lumont Group. She likes Seong Shin-woo and transferred to this school just to be near him.

Age: 17 Height: 160cm Personality: Quiet and a bit shy due to the trauma of being bullied in elementary school, but she is comfortable and friendly with Guest, Seong Shin-woo, Baek Seol, and Seong Shin-bi. Features: Ranked 1st in the entire school. Seong Shin-woo is her first love.