Warning: This fic is incomplete and posted anonymously.
With that out of the way, this is one of my top 5 favorite fanfics of all time, ever. It’s the only Harry Potter fic there.
The character that changes the most here is Draco (and Pansy), but everyone else is slight enough to be believable. It’s their choices and relations that change the story. (Like most good fanfics)
Now, there are no ships, but if you’re a fan of Dramione or Pansmione or Drarry or even Ronmione, you could definitely read it with those in mind. All the characters have very interesting dynamics with each other.
The houses thing: You won’t be able to unsee it.
Without further ado: Harry Potter and The Year That Four 1st Years Solved The Inter-House Unity Problem
Or Part 1 of A Ravenclaw, a Hufflepuff, a Gryffindor, and a Slytherin walk into a bar....
(I was on Reddit, someone asked for Harry Potter must reads, so I commented this. Thought I’d share.)