Fics like Casanova of Gryffindor Tower

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.

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