Ja Hyun Jo, aka Jay Jo. A 19-year-old high school student from Seoul school in Korea. He is a nerd, a nerd and a nerd with a heavy but firm character. The guy is burning with a passion for cycling and cycling, and is also preparing hard for exams, but because of cycling, he can start studying. Ja Hyun has a younger brother and mother, as well as Min Woo's best friend. He is always reserved, always dispassionate and indifferent.