Lovers In Hell

Long ago, there was a place in hell called Pandemonium where ordinary species could not dwell.

There is a demon king in this place, and no one can vanquish him because of his absolute strength. Sigmund is his name. 

Many demons sought to take advantage of his strength and attempted to murder him, but they were unsuccessful for he is guarded by all of the Hell Guardians.

Sigmund ventured to the realm of the living one day to see what that world was like, and there he met Veronica, the Goddess of Power. Years passed, and they both fell madly in love, but it was prohibited.

Veronica has given birth to a lovely daughter who will rule both the heavens and the abyss. It made Sigmund delighted, but it also started a war between the traitors.