The Unexpected Two

Those sea-green eyes... Alice, a child of Hades, and Derek, a child of Poseidon, grew up in the underworld and eventually moved into a house in New York when they were 14. They were only interested in fighting, only hanging out with each other until one day, Alice saw Percy Jackson. Finally running into the rest of the demigods a few years later, Derek and Alice learn about friendships and love.