y/n has always ruled Slytherin beside Draco Malfoy — their friend group feared, admired, and untouchable. Together they dominate Hogwarts’ underground nightlife: secret parties, smoky corridors, and enough Firewhisky to drown their problems. But when Draco begins to soften toward her, everything shifts. Rivalries sharpen, alliances shake, and the line between loyalty and longing begins to blur inside the emerald-lit dungeons. y/n has darkness in her blood.