I Don't Want to Be Human Anymore

When Wen Xueyun woke up, she found she'd been asleep for three hundred years. Her friends were gone, someone had torn down her old home, and a whole bunch of people from the Bureau of Monster Affairs had shown up to tell her to go to school? There's no way she's going to school. She's four hundred years old! What? Room and board are covered, she gets health and pension benefits, and there's a monthly salary? The only requirement is that she keep her identity as a monster secret? She's in. On her first day, Wen Xueyun planned to be an ordinary student, but immediately blew her cover. On her second day, a transfer student arrived, someone with a deep connection to her. By her nth day, Wen Xueyun and the transfer student had started solving cases together. Wait, wasn't this supposed to be everyday school life? How did things get so off track? Theme: Start loving life by keeping your secret identity under wraps