I'm very aware, to begin with, that Korean male pop stars often seem effeminate or homoerotic to Westerners while being very masculine and virilely heterosexual to Asians -- this is a matter of cultural signifiers not translating or mistranslating across cultural boundaries. In most cases, I think, the most glammed up, smooth-skinned, long-haired young men are, in the proper cultural context, very, very straight.
But when I ran across the Big Bang/No Brain collaboration, "Oh My Friend".