Eminence in Shadow, Season 1

Cid doesn’t want to be a flashy hero or a dastardly villain. He wants to operate in the shadows and pull the strings of society with wit and cleverness. So when he’s isekai’d to another world, he spins a yarn or three and becomes the unlikely leader of the underground Shadow Garden organization that fights against a menacing cult, which he totally made up. Except he didn’t; not exactly. Little does he know the cult is real, and they’re not happy that his power fantasy just impeded their plans!