Unsui being on the Deimon Devil Bats might not have changed canon all that much, but I'm guessing Musashi having stayed on the team might have, at least a little. (I figured that, well, if it's AU already, why not slip in a little fix-it in that regards, too.)

To be honest, I think I had more fun writing this, because it had Hiruma in it. (And no incest - I can't quite claim it squicks me, given that I wrote it, but it's still a bit outside of my comfort-zone, no offense intended.)