Succubus Sins

I'm about to make the seven deadly sins my bitch
See this tattoo across my stomach? Yeah, the one with seven crazy runes. Ignore the pink one on the far right, that's Sarah. I love her, but she's not one of my four. That was a hard lesson to learn.
I tried being loyal to her. Even went to a stinky Succubi Den to get a snack or two just to stay alive. Well, that didn't work out, and now I'm stuck trying to charge some dusty old relic my mother left behind. Turns out there's some crazy destiny tied to my tattoo, which is actually a birthmark and all about the end of the world. Sounds fun, sort of, not really.
I've met rune #1, and he wasn't at all what I'd expected. It wasn't love at first sight. Maybe hate at first sight. Pretty sure he hates my guts. But that's okay, maybe rune #2 will bring him around.
This end of the world stuff is just getting started, and I have a feeling one of my very own sins is the one stirring the pot. The Incubus King, what sin might he be? Lust... my favorite one. Bring it on.
Author's Note: This is a fast-burn reverse harem story. It includes explicit language and sexual situations. Intended for audiences 18 years and older. As this is a series, there will be a cliffhanger.