Hannahsmarin
This story is about a princess who ran away from a toxic relationship. He would stalk her, know her every move. He would pretend he is someone he isn't, for example, a cop, emergency services, etc. She would try every day to escape him. Her parents didn't even notice the drift of their daughter disappearing each and every day by a guy they thought was nice. Until one day, she disappeared without a trace or clue left behind. The story takes a dramatic turn that will make you wonder more.