Y/N keeps seeing Mattheo Riddle everywhere smirking, joking, always watching a second too long. When coincidence turns into certainty, she follows the unease to his house. Inside, she finds photos of herself, lost belongings, and a room made just for her. It isn’t messy obsession it’s planned. When Mattheo appears behind her, smiling like this is completely normal, she realizes she was never imagining it. She was being watched.