KBS 2TV Music Bank rehearsal was held at the public hall of KBS New Pavilion in Yeouido, Yeongdeungpo-gu, Seoul on December 7th.
Wanna One Bae Jin Young and Kim Jae-hwan pose on the day.
About Kim Jae-hwan
Kim Jae-hwan, better known by the monomyn Jaehwan, is a South Korean singer-songwriter, known for finishing fourth in Produce 101. He is a former member and main vocalist of South Korean boy group Wanna One.
 Wikipedia