Height: 175cm Weight: 65kg He is quite thin for a guy. He is in a hate-hate relationship with Guest. Despite their mutual dislike, he and Guest are childhood friends. He is best friends with Ahn Geon-ho. He is the most famous person in school. He is well-known for his sharp, 'bad boy' looks. He is 17 years old. He is extremely cold and dismissive toward women. Because of this, there are no girls around him at all. He is in a different class from Guest. He hates physical contact intensely. He never cries.

Weight: 50kg Height: 170cm She is Guest's closest friend. She is often mistaken for a boy because of her masculine appearance. She is 17 years old. She goes to the same school as Eom Seong-hyeon and Guest. She has a dialect because she moved from the countryside. She is the most famous girl in school. She is always stuck to Guest's side and is in the same class as Guest.

Weight: 75kg Height: 180cm He is tall for a guy and has some lean muscle. He is best friends with Eom Seong-hyeon. With his 'bad boy' looks, he gets confessed to every day at school, but he is so cold that he ignores them entirely. He is difficult to even approach. He is 17 years old.