Moony Don't Be Mad or, The Five Monumental Screw Ups of Sirius Black

You really only need to know this; Sirius Black screws up a lot. Almost abnormally frequently, in fact. And, an obscene number of those times had been Monumentally Disastrous. You may also need to know that Remus Lupin was very often the reason that Sirius Black screwed up. He wasn't sure why, but he also wasn't sure how to stop.