Look, nigga it's a simple cartoon about a cute dynamic between a demon, and her ex-husband. If you don't see the appeal already, you aren't going to. There's nothing we can do to make you appreciate or like the dynamic, and it's so obvious- so upfront- that I'm not exactly sure why you expect us to convince you otherwise.
This whole post is like someone talking about how they don't "get" a harem anime. You do get it, there's no way you can't get something so straightforward.
You already know what the cartoon offers, it's very blantant. Your just trying to get some sweet (you)s