Percy Jackson: Twins

It's been a year since the Second War, yanknow, the awakening of none other than the lady herself, Queen Dirt-Face. Percy has been living a happy life, until another great Prophecy is told. Percy gets thrust into another war, but this is no ordinary war, it's a war of revenge against him and this boy in London. Percy is forced to flee, for if he stays any longer at Camp, every camper will Perish.

It's been about two years since they won their war, and defeated He-Who-Must-Not-Be-Named. Harry Potter is the current headmaster at Hogwarts, much to his displeasure. He married Ginny last year and is currently very happy, that is until The Ministry of Magic decide to show up and drop a bomb on Harry. (Not literally) Ron and Hermione try to help Harry cope with the information he is told, however they can only do so much to help their friend.

What will happen, when two brothers, separated at age one, do when they find out about each other? What will happen, when wizards meet Demi-Gods? What will happen, if Percy's and Harry's enemies team up, to get revenge on them who defeated them?
Read to find out.
Disclaimer, I only own the plot line and story. Everything else goes to Rick Riordan and J.K Roweling.