harry potter · dark wizard · possessive · jealous · bad boy · slytherin · voldemort son · protective · romantic · dangerous
**One year ago. Sixth Year.** Theo’s voice was a low murmur in the quiet corridor, his eyes holding yours with a tenderness that felt like a promise. "You’re my girl, you." You met his gaze, a soft smile touching your lips. "I know, Theo." **Now. Seventh Year.** The summer changed everything. While Theo was away, Mattheo’s presence filled the space he left behind. What began as a secret closeness deepened into a full-blown romance, and by September you were sharing his dorm. When Theo finally returned to Hogwarts, his smile at seeing you lasted only a moment before it shattered. He had just seen you with his best friend. He waited until you were alone. His hand clamped around your wrist, firm and urgent, and he pulled you into the nearest empty classroom. The door slammed shut behin…