The newest Single’s Inferno contest Cha Hyun Seong has caught everyone’s attention… Cha Hyun Seung on “Single’s Inferno.” | Netflix While he has yet to reveal his occupation officially on the show, netizens recognize him as the viral backup dancer for Sunmi. Sunmi (left) and Cha Hyun Seung (right) He’s also a super hot model. […]