The Eminence in Shadow

In this action-comedy manga series from Yen Press, the ordinary Cid Kageno reincarnates into a fantasy world and adopts the secret identity of "Shadow," the leader of a made-up underground organization he calls Shadow Garden. To his surprise, the cult he invented to justify his roleplaying turns out to be a real and dangerous threat, forcing him to stumble through a conspiracy while maintaining his cool persona. The series, written and illustrated by Daisuke Aizawa, blends over-the-top battles with deadpan humor as its protagonist's delusions of grandeur accidentally make him a legendary figure.