IndecisiveEmu711
Jimin is scared of thunder and he's all alone.
Jungkook figures his motorcycle isn't the safest place if he wants to avoid the nearing lightning.
Or...
Jimin needs a cuddle buddy and the stranger on his porch seems like a cross between a bunny and a bodybuilder. On Jungkook's side of things, Jimin is really cute when he's scared and he really doesn't hate the idea of cuddling for a while.
*in editing, but I swear I'm just cleaning it up*