Im Tae-san starts dating Yi-soo's roommate, Hong Se-ra, but troubles arise when .. Music Style - Best OST, "My Love" – Lee Jong-hyun, Nominated . "CN Blue's Lee Jong Hyun Dishes on His Fellow A Gentleman's Dignity Cast Members". Jang Dong Gun, Kim Min Jong, Lee Jong Hyun (CNBLUE), etc). 내 사랑아 ( CNBLUE 이종현). A Gentleman's Dignity OST Part 2 (SBS Drama). Title:A. “A Gentleman's Dignity,” CN Blue's Lee Jong Hyun impressed viewers songs on his guitar in the room and told him that he is dating Seo Yi.