Jung Jaehyun, an only child of Jung Yunho Jung Jaejoong's. Jaehyun is famous for his handsomeness and very high popularity and also very rich, Jaehyun is currently studying at one of the universities in Korea.

Jaehyun lives in a dormitory near the university while he is in college and Jaehyun also has a side job as a brand ambassador (Prada)