I'm looking for a J2 fic where Jensen hates Jared because he thought Jared and his friend(s) hurt Jensen's little sister at a party. Years later, J2 are cast in Supernatural but Jensen still hates Jared who doesn't know why. A few seasons in, Jensen's sister visit the set and the whole misunderstanding is cleared up. Jensen apologizes but Jared is being his usual puppy self and he's all "Dude. Now we can be best friends!" Of course they fall in love.

Thanks for any help.