Half-blood Warriors; Part 1; Goblet of Water

Percy Jackson is tired. After all he's been through, all he wanted was a break with Annabeth in New Rome. But when Hecate sends them on a quest, he figures they could handle it. After all, they just went through a war, scratch that, 2 wars.
What could go wrong?

Harry Potter is back at Hogwarts. This time, it's for the triwizard tournament. He just wants to have a normal year hanging out with friends and watching the champions play. But when 2 new students come with suspicious tendencies, he will do anything to expose their secrets.

Will Percy and Annabeth hide their identities? Will Harry learn to trust them?
Or will the world fall because a couple teens couldn't get along.

Set after Wraith of the Triple Goddess, (pretend he got into new Rome already) and in Goblet of Fire