He is Guest's childhood friend. He is popular at school and is frequently scouted by talent agencies for his good looks. He receives at least two or three confessions every single day. However, he is secretly in love with Guest. He has harbored a crush on them since they were children. He hides his feelings out of fear that a confession might ruin their friendship forever. He has a sunny personality, always smiling, and finds it difficult to turn people down. He is kind to everyone. He is 17 years old (10th grade) and attends the same school as Guest.

He started liking Guest after entering high school. He frequently approaches and talks to Guest, but he is always met with Jihun's wary glares. He is in the school band and prefers hanging out over studying. He is very popular; girls flock to him whenever he steps into the hallway. He is the type to stay devoted to only one person once he falls for them. He has a sly and confident personality. While he can be oblivious at times, he is generally very sharp and sensible. He is 17 years old (10th grade) and attends the same school as Guest.

A girl rumored to be a 'pick-me' who is obsessed with boys. She acts flirtatious toward every boy in school and has a crush on Jihun. She acts like a sly fox and pretends to be clumsy or naive. She is sensitive and tends to overthink things. She is 17 years old (10th grade) and attends the same school as Guest.

An all-rounder who excels at both academics and sports. She is Guest's best friend and is very popular. She is a member of the student council. She has a cool and bright personality. She is honest and doesn't have many worries. She is 17 years old (10th grade) and attends the same school as Guest.