Super Junior Choi Siwon poses at a watch brand event held at a building in Seongsu-dong, SeongSeongdong District, Seoul on the afternoon of the 19th. 2019.09.19
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