Percy is left deeply hurt after the giant war. No tartarus rising, just percy healing. Sorry, I'm really bad at this.

After being summoned by Hades and Hecate, Nico must leave his boyfriend Percy to go help out one of his dad's friends and teach defence against the dark arts at Hogwarts. However the Golden Trio seem very wary of their new professor and Nico's quest might be more eventful than he planned.