Kid!AU where Harry and Louis have known each other their entire lives because their moms have been best friends for even longer. And they’re both their own versions of weird and can’t help but rub off on each other."Anne, why is Harry wearing his mittens at the beach?""Who knows, I’ve stopped trying to understand him ages ago.""Oh, I can relate. God only knows where Louis got his streaking habit from.""…is that why my son keeps refusing to put on pants?"And it goes on like that for years because to everyone else they’re kind of weird but to each other they’ve always only been Harry and Louis. So it makes perfect sense that Harry can only eat his vegetables out of a power rangers bowl and of course Louis can only wear green on weekends; they can’t very well break their deal with a fire breathing dragon, you know.And years later after they’ve grown up and both finished school and both gotten themselves heartbroken by a fair number of people who aren’t each other, they find themselves visiting their moms again when someone pulls out an old photo album. And they see the picture of the first time they all went to the beach together and the water was sooo cold but the sun felt just as warm. They get lost in the photos, years upon years of playdates and birthdays and first days of school, all of which were celebrated together. But when they look up they realize they hadn’t even noticed their moms aren’t looking at the photo album with them, but rather staring at their present day sons with gentle grins and watery eyes before one of them finally says"We always had a hunch you two would end up together. What took you so long?"