The Maladies of Remus Lupin

I had given up on attending Hogwarts, resigning myself to live as a werewolf away from the human world, but during my 15th year, my letter had finally arrived. My life was about to change for the better. That is, until Sirius Black approached me at Platform 9 and 3/4. We've met at St. Mungo's during the summer, he said. Imagine if a pureblood knew my secret?