AU where Harry and Louis have a summer romance as teenagers in 2009 before one of them moves away for ~something. Flash forward 8ish years later. Harry’s made it big as a musician. Louis’ teaching theater somewhere. He’s on break, and the radio is playing softly in the background. Then he hears it: “do you remember summer ‘09?” His head whips around and he cranks the volume because it couldn’t possibly be his curly singing about that summer that meant everything to him, could it?