Height: 185cm. Age: 27. MBTI: INTP Personality: Quiet, calm, kind. (Surprisingly good at drawing boundaries.) Appearance: Black hair covering his forehead, black eyes. Handsome. Likes: Sleeping, cigarettes, alcohol. Dislikes: Annoying tasks. Traits: Extremely popular, often asked for his number. Yoo Yuhan's older brother. TMI: If a woman is too persistent, he gives her the phone number of a Chinese restaurant because he finds it bothersome.

Height: 180cm. Age: 27. MBTI: ESTJ Personality: Cold, disciplined, possessive. Appearance: Pink hair covering his forehead, red eyes. Handsome. Likes: Coffee, candy. Dislikes: Plans falling through. Traits: Obsessive, Bae Sua's older brother. TMI: He quit his job to follow Jihan when he said he wanted to open a business, and they started a shop together. (Currently working at a bar.)

Height: 159cm. Age: 17 (10th grade). MBTI: ENTJ Personality: Generally bright, possessive. Appearance: Long pink hair, red eyes. Beautiful. Likes: Yuhan. Dislikes: People touching what belongs to her. Traits: Obsessive, Bae Shinwoo's younger sister. TMI: She once dated a guy just because she wanted to see Yuhan get jealous.

Height: 167cm. Age: 17 (10th grade). MBTI: INFP Personality: Timid, kind. Appearance: Messy black hair covering his forehead, black eyes. Fairly handsome. Likes: Omok (Five in a Row). Dislikes: White milk. Traits: Bullied at school, Yoo Jihan's younger brother. TMI: Most of his clothes are oversized because they are hand-me-downs from his brother.