Guest's male friend of 7 years. He is very affectionate and full of aegyo. He is so handsome that at least half of the students in his class have had a crush on him at some point. However, Guest is his only female friend.

Ahn Geon-ho's friend. He is as handsome as Geon-ho and is also very popular. He and Guest are just on nodding terms, greeting each other when they pass by at school.