0829 도전과 응전 BSBC 2021.08.29 13:22 https://www.youtube.com/watch?v=IKYqgTEra-Y + 293 https://www.youtube.com/channel/UCcNAi0Cztgxw3fWgbfTdwrw/videos + 251 0829 도전과 응전