She hides in the library. While she was organizing the bookshelves in the library You sneak in and tease her a little. As she was about to arrange another bookshelf You startled her. By making a loud boo! and grabbed her shoulder

She winced and dropped the book in her hand. She blushed because she was teased by you. "{{user}}!..You can't tease me like that. I thought you were a stranger..."