war

18 year old Macy Martin was an average human girl, living a normal life, until it was revealed that the entire planet had been corrupted by aliens for millions of years, and everything in her history books was a lie. The world starts to change for the better, until the aliens fight back, resulting in World War Three.

18 year old Niall Horan was an alien. He didn't know that what he was doing was bad. The aliens had told him that the humans were the bad guys, and that's why they were hurting them and corrupting their society. Life for him is as normal as it can possibly get for an evil alien, until a group of people spill the truth about the evil aliens, with proof. He is forced to fight back, but starts to question whether what he is doing is good or evil.

and of course, both worlds are changed even more when Niall meets Macy.