First Severus Snape is coming down with a strange disease, then he notices that something seems to be terribly wrong with his magical skills. And as though all that was not bad enough, Minerva McGonagall suddenly starts interfering in his problems.
Sirius Black and Severus Snape are forced (by Dumbledore's order) to spend one week together in the Muggleworld, without magic but therefore with Remus Lupin. No slash.
After Sirius' death, Remus decides to leave Grimmauld Place and to live together with...Severus Snape. No Slash.
After Sirius' death, Harry thinks that nothing matters to him anymore, until he realises that Snape's words do...the final chapter is on.
(Chapter 5 is up :) Seit Lupin und Sirius Snapes Leben aufmischen, ändert sich für diesen alles, leider nicht unbedingt im positiven Sinne...(RR pls)