Ohhhh I see. He's shooting a historical drama. Or more specifically, a time-travelling/medical/fusion-sageuk - in which he plays a Goryeo-era bodyguard to the king, who kidnaps a plastic surgeon from the 21st century. Wait - what?? 

The hair.... its so silky. I just want to touch it. I want to run my hands through those exceedingly feminine but pretty curls. I wonder what shampoo he uses.

Oh wait, nevermind. Just realised that its a wig. Shame.

Picture sources: www.dramabeans.com