Voldemort's Grandson teaches at Hogwarts

This happens after the giant war and the wizard's war. I have brought all the good people back. Harry thought he would get some peace after the war with Voldemort, but Dumbledore told him some shocking news. Percy thought he could get a break after the war with Gaia, spend some time with Annabeth, but the fates hated him. What will happen when Harry meets Voldemort's grandson? What will happen when Voldemort's grandson meets his grandfather's bane? Will they get along?

P.S this story is written by another person using this account, not by the one who wrote A New Kind.