Okay so idk if something similar has been done before, I've had this idea for a story knocking about in my head for a while.
Basically it begins like an archetypal fantasy story - a dragon attacks a kingdom and takes the princess hostage. Eventually a brave hero turns up, defeats the dragon in an epic battle. As a reward, the hero is granted the princess' hand in marriage, not to mention an abundance of gold.
...EXCEPT, the entire thing is a ploy orchestrated by the princess, the dragon and the hero - who are actually in a polyamorous relationship - working together to get what they want.
The hero and the princess were childhood friends and loved each other but were forbidden from being together because the hero was born a commoner. At some point they made friends with the dragon, (who is actually not a "true" dragon but can shapeshift between a draconic or humanoid form). Perhaps they find the dragon wounded in the wilderness, and work together to nurse them back to health.
The romance between the three of them gradually blooms, but they can never hope to be together. A princess, a commoner, and a dragon - society would never allow it! Unless... they figured out a way to trick them.
The dragon attacks the kingdom and "kidnaps" the princess, the hero turns up and "defeats" the dragon (using some bullshit chosen one powers that they totally made up), forcing it to retreat. As a reward, king grant the hero the princess' hand in marriage, and a castle to live in. They pull some strings to slip the dragon (in human form) into the castle. In the coming months, nobody notices on the hooded stranger who quietly slips into the newly-betrothed couple's bedchambers...
And perhaps in a few years the dragon will come back for its "revenge". After all, they all rather enjoyed the theatrics of it, and these stories are always better with a sequel, right?
[TLDR: a polycule consisting of a princess, hero and a dragon scam and entire kingdom into giving them a comfortable life and letting them spend their lives having freaky throuple sex whenever they want. Yes this is an excuse for me to write about threesomes.]













