@Mister1k is right, i also read from a news source today that south korean government is going to ban cryprocurrencies, you can read yourself from this source
http://mobile.reuters.com/article/amp/idUSKBN1F002A May be this news is a false rumour but the topic of this thread is related to exchange, so how can anyone confirm if the OP is honestly returning bitcoins or not? His website is also non secure, just waiting for someone to confirm his service
If you read that article carefully, you'll see that it'd be a process lasting quite a while. And with exchanges being easily available in Japan, fears of capital flight are more than likely to halt the process once they start looking more closely at it.
Is it overall going to mean a lot more regulatory oversight in Korea? Probably I'd say. You've also got to look at the whole game item/account marketplace of which Korea has an amazing share that might take a knock from this type of regulatory overreach, I don't think an actual ban is likely at all.