Okay, so I have actually lived in Korea for 15 years, and am into self hosting, servers for media, etc.

What I can tell you is, you are fucked. Peering to anywhere other than Japan is a nightmare.

Give up and build your own server in your own home. No amount of peering tricks or CDNs will help you.

The best you’ll get in terms of connections to major service providers is hosting in Dallas, which should get you around 100mbps.