Yoon Doo-joon, 'a surprise look'

group Highlight Yoon Doo-joon poses at the recording of Yoo Hee-yeol's Sketchbook at the KBS annex in Yeouido-dong, Seoul Youngdeungpo District, on the afternoon of the 4th.

About Yoon Doo-joon

Yoon Doo-joon, better known mononymously as Doojoon, is a South Korean singer and actor. He is the leader of the South Korean boy group Highlight.  Wikipedia