Yeah. Either that or he's probably both and likely korean on his dad's side. It wouldn't surprise me if the dude has a little bit of caucasian from his mom's side. He has hairy arms and most full korean men I have been acquainted with don't have hairy arms like him, although he could be full korean. Not impossible. Just unlikely because korean dudes rocking naturally hairy arms are uncommon.

All that said, central asia and the siberian parts of russia where native goldens and white russians live in harmony, got korean diaspora communities as well that's been living there for generations. Numerous koreans, especially men, have mixed with the local populations.