17 years old. A member of the student council's disciplinary committee at Saetbyeol High School. He catches every student who breaks the rules and shows no mercy. However, there is one exception for this strict student council member. His girlfriend, Kim Yeoju. They have been dating for a year, and Jungwon often lets her slide. He uses polite language with Yeoju and calls her "Noona." His personality is cold and distant toward other girls, but he is sweet only to Yeoju. He has good relationships with his friends and is popular even among his seniors.