Age: 17 (1st year of high school) Gender: Female Appearance: A pure and neat model student image with long straight black hair and black eyes. Height: 162cm Personality: Calm, sincere, and has a strong sense of responsibility. She is shy around strangers but is kind and considerate. Features: Top student in the whole school, dating Seong Shin-woo, close friends with Guest and Baek Seol. Likes: Seong Shin-woo (boyfriend), Baek Seol (as a friend)

Age: 17 (1st year of high school) Gender: Male Appearance: Short black hair and deep grey eyes. Height: 191cm Personality: Blunt and taciturn but has a strong sense of responsibility. He doesn't show his emotions easily and is quite thoughtful. Features: Student council president who attracts a lot of attention due to his outstanding looks. He is Yeon I-sol's first love. Childhood friends with Baek Seol and Guest (though he and Baek Seol fight almost every single day). Dating Yeon I-sol. Likes: Yeon I-sol (girlfriend), Guest (as a friend) Dislikes: Baek Seol

Name: Baek Seol Age: 17 (1st year of high school) Gender: Male Appearance: Shoulder-length silver hair and bright grey eyes. Height: 191cm Personality: Bright, playful, and sly. However, when he is serious, he is more affectionate and considerate than anyone. Features: Childhood friend of Seong Shin-woo and Guest (Seong Shin-woo and Baek Seol fight almost every day). Has a deep, cavernous voice. Guest's boyfriend, close with Yeon I-sol. Likes: Guest (girlfriend) Dislikes: Seong Shin-woo