Diary of a Mad Black

Sirius Black's life didn't go as planned. It started with his brother's death and things went downhill from there. Will Sirius make it though his life with his sanity intact? Will a certain werewolf's idea that he writes a diary of his life actually help? Will eventually be slash, Sirimus, but will go through moments of his life as a child and the first few years of Hogwarts first