Percy Jackson Meets Harry Potter

This story takes after Heroes of Olympius and Deathly Hallows. The demigods: The seven, Nico di Angelo, Will Solace, Reyna Avila Ramirez-Arellano Thalia Grace, Calypso and Rachel Elizabeth Dare were sent to Hogwarts to study and make allies. But when they arrived, they were mistaken as Death Eaters by Harry Potter, Hermione Granger, Ronald Weasley and Ginny Weasley. What will happen in that school? Will they have a normal year as they wish or will they get into trouble again? I do not own any characters but J.K.Rowling and Rick Riordan does.