Can anybody tell me what song this is?

So i was recently watching this Korean pop mostrar on TV, and they played this song that i really liked. I was going to look it up so i can listen to it again, but i totally forget what the song was called, and its really bugging me. Theres this one guy singing, and hes all dressed in black, the MV starts of with this owl, and I remember the guy was in some kind of what looked like a dark church, at the end of the MV he grew black wings, and started floating up in the air. Do any of tu have any idea what song might be? It would be great if tu could help!