Eh???? The bottom looks like that one story kinda same here, but the top is a succubus. I ...

About the demon king or something?

I actually forgot but the intro of that story is that the bottom wants to close a gate, that gate will make you go to another dimension which is where human lives as it's a way for succubus to live. Where to feed off the pleasure that humans feel when they're having sex.

I thinks it's Moon of the Devil World