Fanart for VioletHyena's fic "In Your Dreams" if you like One Piece and good AUs I recommend you to check it out!

Zoro is a cambion, which means he feeds on sexual energy. A small crew like the Strawhats, its not normally enough to keep a cambion satisfied, but Sanji happens to be an abnormally sexually driven cook so it usually works out okay for Zoro. At least, it works out alright until Sanji finds out that Zoro's been taking energy from him through his dreams. For Sanji, he's trying to wade through the confusing mess of emotions for a certain marimo after a surprise kiss on the battle feild. It's not easy to do on a normal basis. It certainly isn't any easier when the man he has deeper feelings for is a cambion. Then everyone learns how important it is to keep their local cambion fed, for if they don't, someone might get eaten. literally.

“You’re not like any kind of demon I’ve heard of.” Law said. “I was expecting a lot more of a ‘fiery hellbeast’ look.” “Nah, those’re my brothers.”

It’s funny, Robin notes as she sits on the deck of the Thousand Sunny, book in hand, That the people who are called Demon, Monster, Devil aboard this ship of dreams are not the true Monsters. No, she thinks, watching her crew as they spend the day on the deck of the Sunny, Not monsters at all. - Or: The East Blue has a different nickname to those in the Grand Line, and those who hail it as home have a few... unique traits.

On the high seas pirates draw their power not from devil fruit but with deals with demons, and pay the price in turn. Blood, salt, and water, everyone's soul is on the line, but only if you're fool enough to make a deal.