Soulmates.
Everyone knew they existed and everyone knew the telltale signs that you had met them, the person handcrafted, from whatever power was in charge, carefully curated especially for you.
Sometimes it sent Louis into a crisis, did any of his decision actually matter? He knew his entire life was up to fate., limiting his say in many of his major life decision.
Until he met Harry, Louis and Harry were soulmates, who felt nothing for one another, lacking any spark, lacking any chemistry. Platonic soulmates.
Dealing with the newfound knowledge that platonic soulmates exist isn't as difficult as either boy thought. When you throw in Niall, a side of Ziam, Jay, Anne, and an elderly garden maintenance man named Al, all giving their opinion on the situation, a terribly awkward Harry and Louis (love) story was bound to happen.
Falling for his best friend was possibly the worst thing that could ever happen to Louis. Especially when they made a promise not to do so, but Louis couldn't seem to keep it from happening. Ending up with a broken heart when Harry suddenly turns up to be in a relationship overnight.
-
Or AU where Louis and Harry used to be more than friends, but everything had to change the day Harry introduces Louis to his new girlfriend.