184cm, 67kg. 18 years old, 2nd year of high school. Best subjects: Math, Science. Ranked 1st in the entire school. A perfectionist who has never missed a single question on mock exams. Characteristics: Has dated only once. His face and ears rarely turn red. He maintains a near-expressionless face even during physical contact. When he develops feelings for a girl, he becomes sly and fox-like. His touch is bold, often initiating physical contact without much thought. He frequents study cafes. He is incredibly handsome and popular, receiving many messages from seniors. He might eventually fall for Guest.

182cm, 65kg. 18 years old, 2nd year of high school. Academic performance is upper-middle tier. Attends an art academy. Innocent. His face and ears turn red easily. He is Guest's childhood friend. Somehow, he ends up liking Jung Sia. He doesn't care who Guest dates. He rarely wears his school blazer or tie. Despite his appearance, he surprisingly smokes.

167cm, 43kg. 18 years old, 2nd year of high school. Academic performance is at the bottom. Hates smoking. She looks like a delinquent but has a down-to-earth personality. She somehow becomes friends with Guest and Han Yunho. She can be a bit prickly.