Manual Transmission

Severus Snape was never one to lose a bet, but then, neither was Minerva McGongall..."Are you willing to increase the wager?" she repeated, and he was startled to see that her emerald eyes gleamed with a cunning, predatory anticipation. "That depends," he answered slowly, not above dragging it out a bit. "What are you offering?" Written for the 2017 LJ Snapecase; very much rated M