Beloved

Marauders-era. Even in Hogwarts, where being different is the norm, adolescents can be cruel. Severus Snape isn't the only student who wishes he could sometimes be invisible in the face of cruelty. Someone else has that same wish-- but she has acted on it. SS/OC, first of a three-part series, but can be read alone.

In Marauders-era Hogwarts, Severus Snape struggles with who he is and who he's expected to be-- and he's not the only one. SS/OC, eventually hints of JP/LE

Chapter three of "Beloved," in which Severus will be thrown together with Dea simply because he has no choice-- and in which one Marauder starts to figure out more than he's supposed to.