The Royal Ball of Elysium

Demon AU - Water demons are especially fertile, all of them. In most realms, they're kept as slaves for breeding, only King Hades of Elysium freed them to offer them a better life. His son Nico is rather uneducated and wants to meet a water demon to learn more about their race. He finds one in the royal stables... Nico/Percy slash mpreg Nicercy