Gahaha! So What If I Went Back in Time?

In a bustling ancient city, an inconspicuous little bookstore hides a remarkable secret. Its exterior is quaint and old-fashioned, but its interior is a world of its own. The protagonist, Li Qing, is a young scholar who accidentally discovers that the bookstore can send people into the worlds of books, letting them experience their strange and wondrous realms. The bookstore's owner, a mysterious old man, tells Li Qing that he has been chosen as the next time traveler, entrusted with maintaining peace in the worlds within the books.