Coffee Shop New Demon Castle

An other-dimensional labyrinth of gourmet food and love!? Five years ago, the Demon King died. Now, in Tsukitaka City, there is a retro coffee shop run by a tough-looking manager. The manager, Don-san, is a former Demon King. He runs the shop with part-time worker Akari and barista Isamu (a former hero). However, the customers are all adventurers who visit with troubles, and the place of relaxation is constantly in turmoil, with the three staff members constantly getting caught up in it! And the manager's past becomes a disaster that slowly begins to affect the town...

(Source: Kadokawa, translated)

Note: It initially began serialization on the author's Twitter as "Nekomimi Kissa no Manga" on August 1, 2023. It was later acquired by Kadokawa who published the first volume on July 12, 2024.