Forever Young - Larry Stylinson/ Peter Pan

Harry's life in London is pretty average. He's always wished for something more exciting, so his sister starts telling him ridiculous stories about a boy a world away that never has to grow up, goes on amazing adventures and never ever has to listen to grown ups. Harry could only dream of such a thing, he knows it's only made up though. But what happens when the Peter Pan of these stories shows up at his bedroom window.

Or the one where Louis is Peter Pan and Harry's a boy looking for freedom and adventure.