This is the PyeongChang Olympic gold medalist Yun Sungbin YouTube channel.Please show a lot of interest!ㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡㅡBusiness Contact: [email protected]인스타그램: https://instagram.com/top.physical?ig...#Yun Sungbin #Kendo