Generic Light Novel / Manga / Anime Jump

From the introduction: As you feel reality shift around yourself, you appear in the middle of a grand library with shelves filled to the brim with… Manga, Light Novels and Blu-Rays. “Ah, you have come. I have been expecting your arrival”. In front of you stands a cloaked being who bows to you as a form of greeting, “This place is a realm is used to store certain forms of stories, at the moment we’re in the Japanese section of the collection. This section covers all the stories the Japanese have told throughout their many variations throughout the Multiverse”.