Jeong Yoon-jo

When Seo Eun Young's fiance, Kang Jung Woo, leaves her alone and pregnant, she manages to get on with her life. Just as she has a chance to find happiness with Kang Hyung Woo, Jung Woo returns to complicate everything.

Goong-dahl, a typical loser billed as the "unluckiest man alive" returned to the school after one year's intense training of reject student's treatments. Now he is up to the challenge of posing him self other than a typical loser. With the leads from his another old fellow mate he started with a new face by threatening and rescuing hot girl "Min-ah" from several oldies in the school. Everything went smoothly up to the plan until one of the bully is happened to be the schools notorious thug "Jae-koo" thus receiving invitation to a grand duel on the roof top after the school.