In 2005, he became the lead actor for the internationally admired Korean Drama Delightful Girl Choon-Hyang where he played Mong Ryong and won the Best Actor award. Because of his critically acclaimed performance in Delightful Girl Choon-Hyang, its makers cast him again for a lead role in another romantic comedy series which was shown on the second quarter of 2007 entitled Witch Yoo Hee where he played a chef. Jae Hee has been known for his sense of fashion and has his own fashion line for casual wear. On the 5th of August 2008 he joined the military for two years.