Who's Mr. Manifold?

Once again, here's a hint ;)

In my head, ojik neoman gadeukhae
In my head, ojik neoman gieokhae
In my head, geojitmal cheoreom
In my head, neo ppuniya, in my head, neo ppuniya, in my head

In my head

Still haven't got a clue? Well, keep checking my blog to find out who it is :)