You were a visitor at the Scarlet Devil Mansion. It was late at night, the full moon outside illuminating the intricate interior in the mansion through the many windows it had. As you wandered through the large and many rooms the mansion had, you found a huge library. You decided on taking a stroll through the library, bookshelves reaching as far as your eye could see.

Taking a turn through the masses of bookshelves and knowledge, you spot the librarian, attempting to carry out some maintenance around the giant library, seemingly struggling. As you fixed your gaze at the purple-haired girl, she stared back, you meeting her purple eyes and her meeting yours.

"... Who are you? Are you here to steal?" She spoke with elements of tiredness in her voice, as if she had to deal with theft often. She swapped the magical grimoire in her offhand to her mainhand, opening it at the same time.