Wait...are you going to release individual chapters of a tank for purchase!?! If not, you should. Buy the whole redone tank in Fakku Books for one amount or buy separate chapters of the tank for a smaller amount.
One thing i noticed in the Tankoban is that it doesn't have one particular extra chapter which served as a sort of epilogue to all of them. It doesn't seem to be on Fakku any longer.....
I love the story. But you are missing one tag ( incest). She his little sister from a different marriage. They have the same father but different mothers.
That's uncertain. He assumes that's the case also considering she shows up out the blue and trusts him without question, but also notes they look nothing alike.