You don’t need to watch Hannibal to appreciate the sheer WTFery of this Korean promo. As long as you know that the show itself is a violent, intense drama about a serial killer cannibal, the fact that this video has anime sparkles, floating hearts, an excited voiceover, and the main character’s head photoshopped on… a Korean pop star? I don’t even know… should strike you as appropriately weird.
A partial English transcription is here. At one point Hannibal apparently says “HEHEHE I’LL HELP YOU HIDE THE BODYYYY <3."