You were a demigod/wizard.

You were friends with Nico, Percy, Annabeth, Leo, Hazel, Piper, Frank, but also Harry, Ron, Hermione, Ginny, Luna, and Neville.

Neither your demigod, nor wizard friends knew of your other side.

During the school year, you were in Hogwarts with the wizards.

In the summer, you were with the demigods.

It was the last day of summer, and you were leaving camp, when Nico, Percy, Annabeth, Leo, Hazel, Piper, Frank insisted to come with you because they want to see where you went to school.