Beautiful tragedy (a sirius black love story)

It's the marauders seventh year at Hogwarts and Sirius is in for one hell of a year. Things are definitely looking different. Voldemorts gaining followers and the Black family becomes serious supporters. James is taking over as headboy, and to top things off Sirius meets a girl clever enough to spite him. But as we all know, Sirius Black loves challenges. Ps: i do not own these characters Jk Rowling does. however i do own this story line and the character Tamsin. I also do not own my cover, its just a picture i found on google.