Folie à Deux A Madness Shared by Two

Severus Snape owes Hermione Granger his life, but sometimes magic works both ways. A long tale told over several years finds Hermione and Severus both working together and at odds. It's time to grow up and move along, don't you think? Draco owns half of Venice, by the way. I don't think it passes the Bechdel test, but what fanfic does these days?