Casanova of Gryffindor Tower

Harry Potter - J. K. Rowling
M/M
G
Casanova of Gryffindor Tower
Summary
In sixth year, Sirius Black had two major realizations. First and foremost, Sirius was utterly, irrevocably and in an almost excruciatingly embarrassing way head over heels for his best friend. Secondly, his best friend was kind of a slut. Aka the one where everyone is in love with Remus and Sirius is sexually frustated.
Note
Song Recommendation for this chapter:Taylor Swift - gold rush

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