City of Olympus

This will be a Mortal Instruments and Percy Jackson crossover fanfic!
Main characters: The Seven + Nico, Clary, Jace, Magnus, Izzy, Alec, and Simon.
This takes place after Blood of Olympus and City of Heavenly Fire. Even though they should be completely different ages since those series ended in completely different years (in the stories not irl) we are going to pretend that they are all the age they were when their stories ended.
So, I hope you enjoy reading this!