[All] Who is the eldest brother among the three who appeared in the drama DP?

You played the role of a villain battalion commander in the drama DP

Actor Hyun Bong-sik in the middle is the youngest and was born in 1984.

And actor Son Seok-gu was born in 1983.

So the correct answer is that Mr. Koo Kyo-hwan, born in 1982, is the oldest brother.

Actor Koo Kyo-hwan really looks young haha