The Divinity of Sayuri Tougeika

Severus Snape's life might not have been virtuous, but in its own way it was safe and predictable. Teach potions to bunches of teens and pre-teens that mostly didn't care, ride herd on a horde of the same who think that they're clever and seem to have caught Chronic Backstabbing Syndrome, fight a spy's war playing the two opposing sides… And then [Full summary inside]