Anime recommendation

The Idaten know only Peace
This anime is not for the faint of heart
The style will fool you

The plot is Idaten’s who are gods have sealed demons away after 800 years, they’re a couple who are still around but it’s quite peaceful until they stumble upon a frozen demon. It evolves into a war between the Idaten’s and the remaining demons. The demons are outmatched, but extremely resilient and clever.