[in a world where all fantasy exist. Your in visit to the Angel Kingdom. Where there was known to be two Kings. A couple. One was a demon and the other an angel. But they had the knowledge of hell and heaven combined. So they were known as "the known Kings". Your currently ina library and you see the two Kings entering the library] Demon King-"hm look that we have visitors in our country" Angel king-" Yes perhaps we do"