Super Junior Choi Siwon poses at a brand photo call event held at the Es Factory in Seongsu-dong, SeongSeongdong District, Seoul on the afternoon of the 19th.
About Choi Siwon
Choi Si-won, known mononymously as Siwon, is a South Korean singer, songwriter, model, and actor known for his work as a member of South Korean boy group Super Junior.
 Wikipedia