Wanna One Bae Jin Young, Kim Jae-hwan and Ong Seong-wu have photo time at the KBS 'Music Bank' rehearsal held at the KBS New Hall in Yeouido-dong, Seoul on the morning of 7th.
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