Lee Chang-sub - Seo Eunkwang, 'You can do both'

group BtoB attends the Together Again k-pop Concert (k-pop Concert) held at SK Olympic Handball Stadium in Seoul Songpa-gu Olympic Park on the afternoon of the 17th and has photo time.

About Lee Chang-sub

Lee Chang-sub, better known mononymously as Changsub, is a South Korean singer, songwriter, host and musical actor. He is a lead vocalist of the South Korean boy group, BtoB.  Wikipedia