For years, Y/N has been nothing more than a shadow in the halls of Hogwarts. Quiet. Intelligent. Observant. She has never cared about being noticed, and the students around her have never had much reason to notice her. Especially the thirteen Slytherin boys who seem to command every room they enter. Draco Malfoy. Theodore Nott. Blaise Zabini. Adrian Pucey. Tom Riddle. Mattheo Riddle. Lorenzo Berkshire. Barty Crouch Jr. Regulus Black. Evan Rosier. Cassius Warrington. Graham Montague. Damocles Belby. They're friends. They're familiar with one another's secrets, habits, and personalities. But they don't know hers. They don't know the quiet girl they've passed in the corridors countless times. They don't know she's been there all along. And they certainly don't know that while they've spent years thinking nobody is watching them... Y/N has been watching everything. Because being unnoticed doesn't mean being unaware. Sometimes, the person everyone overlooks is the person who sees the most. And eventually, they're going to notice her. They just don't know what happens after that.