The Seven Go To Hogwarts

JK Rowling and Rick Riordan own everything.
Takes place in Harry's fourth year. Ginny takes Ron's place in the Trio.
The Seven are having a peaceful summer. Leo found his way back with Calypso and everyone is happy. Gaea has been defeated and all threats are gone, so they thought. Chiron gets a call from an old college, Albus Dumbledore, saying that a very evil wizard is arising and he wants protection on his target...Harry Potter. Chiron chooses his best demigods. Unfortunately for the Seven, that means they have to uproot their lives and go to non other than Hogwarts. I know the age differences are crazy, but just go with it please.
Ships:
Hinny
Romione
Nuna
Percabeth
Caleo
Frazel
Jiper