Gu Jae Yi, Jang Hee Jin, Jung Yeon Joo and Choi Yeo Jin Attend Defaye Black Event - April 11, 2014 [PHOTOS] Tags Gu Jae Yi Jang Hee Jin Jung Yeon Joo Choi Yeo Jin BY MyraStar Apr 11, 2014 09:46 PM EDT