Sirius hooked his thumbs into the belt loops of Remus's trousers. He liked this whole being pinned against the wall business. The bookshelves provided a nice, if not impenetrable or entirely reliable, shield from outside eyes. But that was part of the thrill, knowing someone could stumble upon them by accident.
"If we're caught, blame it all on that devil, Sirius Black." There was a smirk on his face as he sealed his mouth over Remus's. Needing to close more of the distance, Sirius tugged on the belt loops and drew their bodies closer together as he kissed Remus.