Yeah, this combo is exactly as weird as you think it will be.
But it also kind of works? In that the Numa Numa song was actually a kind of angsty song about a rocky relationship (who knew?!) and Gravitation is a kind of angsty anime that will LITERALLY ALWAYS OWN MY HEART. I'm amazed that this video is almost ten years old. Makes me wonder what else I used to love that I've kind of forgotten about as I moved on to newer, shinier things?
Song: Dragostea Din Tei by O-Zone (English version)