This picture is Jang Keun Suk’s appearance in the TV series

It's "Love Rain". The picture is of Seo Joon, played by Jang Keun Suk in Modern Times, who is a photographer.

Love Rain is a 2012 Korean love TV series directed by director Yoon Seok-ho and starring Jang Keun-suk and Lim Yoona. The two of them played two roles in the 1970s and modern times respectively in the play. This drama tells the story of a love that extends from the father's generation to modern times, and the story of two people who are destined to go from quarreling enemies to falling in love. Kind of like if love had providence. The ratings of this show are not very high.