As Potter is to Snape

Severus Snape has agreed to take in Harry Potter during the summer before his Third Year. Temporarily. Just until the end of summer and not a day longer. But secrets about Harry's home life are being revealed and things are changing too fast for Harry to keep up. Can he and Snape survive their time together? If not, it's going to make for a very long summer. I've moved up the blowing up of Marge to the very beginning of summer.
This is 100% an AU. Almost everything is different and you'll see that from the very beginning.
Adding to say that it's so AU that Dumbledore and McGonagall are married (he's been aged down and there's a whole post about it) and they adopted snape when he was 14. This is apparently the thing that catches people the most off guard lol.
Crossposted on ao3 and ffn under the same name.