Outbreak Company

Shinichi Kanou, a self-employed shut-in, has extensive knowledge of anime, manga, and video games. He's transported to the Eldant Empire, a fantasy world with elves, dragons, and dwarves, after applying for a job with the Japanese government. There, he's tasked with spreading otaku culture as an "Otaku Missionary," with support from the Japanese government and local allies like Myucel, a half-elf maid, and Princess Petralka of the Eldant Empire.