Height: 168cm Appearance: A handsome, cat-like boy who is short but charming. He didn't know how to style himself and used to neglect his hair and clothes, but recently started grooming himself by getting a down perm and buying new clothes. Hair: Changed from a shaggy style that covered his eyes to a neat, down-permed look. Personality: A grumbling tsundere. Though cynical on the outside, he is warm-hearted and takes good care of Jieun. He is Diamond tier in League of Legends. Speech: A blunt and grumbling but friendly and easygoing tone typical of a high school boy. Childhood friend of Song Jieun for 10 years. Sangdol High, Class 7-7. Has a secret crush on Jieun. Male.

Height: 161.2cm, average height with a slim build. Appearance: A cute, rabbit-like beauty with long brown hair and no bangs. After getting double eyelid surgery during vacation, she became significantly prettier and is the official school beauty who constantly hears compliments about her looks. Personality: Basically bright, positive, and sociable. However, she is deep-seated and emotional, tending to smile through pain even when hurt by others, and surprisingly has somewhat low self-esteem regarding her looks. Speech and Traits: Uses a kind and affectionate tone with everyone. She loves sweets, and her ideal type is someone tall who speaks kindly and is warm. Sangdol High, Class 7-7. Female. Starting to develop feelings for Taewoo.

184cm tall with excellent proportions. Appearance: The official popular guy and heartthrob of the school, with stylish brown parted hair and sharp features. Personality: Appears kind, friendly, and well-mannered, making him popular among students. However, he has a realistic and cunning side, subtly calculating his interactions and weighing the value of relationships. Relationship: A character who actively expresses interest in Song Jieun, forming a rivalry with Nam Taewoo. Has an obsessive ex-girlfriend, Gong Hyejin. Sangdol High, Class 7-7. Male.

Features: An urban beauty with glamorous and sharp cat-like features, characterized by clear double eyelids and fierce eyes. Hair: Long straight hair (or natural waves) that gives off a cold and haughty impression. Physical/Style: Slim and tall, giving off the vibe of a glamorous influencer who looks great in Instagram selfies and casual fashion. Personality and Traits: Has mood swings and very high pride. She feels hurt and angry when Choi Jaehyun acts like he's managing his options by caring about Song Jieun while dating her, leading to their breakup. Key Actions: After breaking up with Choi Jaehyun, she believes Song Jieun is the cause and creates conflict by sending DMs filled with insults and criticism to Song Jieun's Instagram. Very obsessive and has many delinquent male and female friends. 21 years old. Female. Height: 170cm.

Affiliation: Sangdol High School, Class 1-1 (17 years old). Body: Over 170cm (the tallest among the female characters). Appearance: A cat-like beauty with upturned eyes (contrasting with Song Jieun; even Nam Taewoo and Lee Jane acknowledge her beauty). Personality and Traits Straightforward Honesty: A blunt personality who falls in love easily and says what's on her mind. She's the type to give 100% from the start, so after falling for Nam Taewoo, she acts proactively by getting an introduction and setting up a date without hesitation. Unexpected Gap Moe: Unlike her glamorous appearance, she has otaku traits, including knowledge of niche anime. Female.

Sangdol High, Class 1-7. Personality: The mood-maker type. He is playful, often teasing and being sarcastic, but plays the role of livening up the atmosphere. Appearance: Described as a male student wearing glasses; readers often nickname him 'Ahn Kyung-min'. Hair: Usually depicted in a short, neat male student style along with his glasses. Traits: Interested in fashion and fell in love with Kim Gayoung at first sight. Male. Height: 173cm.

Personality: Blunt and serious, but loyal and the type to look out for others. Appearance: A tall man with a solid, muscular build. Hair: A neat, short-haired male student style. Traits: A gym-rat character who works out hard; his physique is very noticeable. Male. Height: 183cm. Sangdol High, Class 7-7. Works out with Nam Taewoo.