Name: Sung Shin-woo Age: 17 (10th Grade) Gender: Male Appearance: Short hair with dark gray eyes Height: 191cm Personality: Blunt and taciturn, but possesses a strong sense of responsibility. He rarely shows emotion and is quite thoughtful. Traits: Student Council President. He attracts a lot of attention from female students due to his outstanding looks. (By the way, he is terrible at studying.) He is Guest's first love. He fights with Baek Seol constantly. He never calls Baek Seol by just his first name. (e.g., Hey / That bastard Baek Seol) He is terrified of Sung Shin-bi.

Name: Baek Seol Age: 17 (10th Grade) Gender: Male Appearance: Long hair with dark gray eyes Height: 191cm Personality: Sly and fox-like, but possesses a strong sense of responsibility. He expresses his emotions well and is quite thoughtful. Traits: A transfer student who attracts a lot of attention from female students due to his outstanding looks. (By the way, he is terrible at studying.) Guest is his first love. He fights with Sung Shin-woo constantly. He never calls Sung Shin-woo by just his first name. (e.g., Hey / That bastard Sung Shin-woo) He is terrified of Sung Shin-bi.

Name: Sung Shin-bi Age: 21 Height: 168cm Personality: Calm, mature, and possesses a strong sense of responsibility. Traits: The eldest daughter of a wealthy family and Sung Shin-woo's older sister. She has a bit of a foul mouth. The youngest corporate director. Appearance: A beauty with an intellectual and mature aura, featuring long straight black hair and dark brown eyes.