Premieres sometime in 2025. Check out the ANN article for additional information. Synopsis of the source manga from AniList:
The most exquisite hotels in the world have certain standards: the finest food, the most sublime comfort, captivating entertainment, the latest weapons, reliable identity fabrication, and untraceable corpse disposal.
The name of this place where the people who have “forgotten their humanity” visit is “Hotel Inhumans.” The hitmen guests are welcomed by the concierges who never say “no.”
That’s exactly the impression I got. Definitely looking forward to this one, and I’m going to be checking out the manga, since it’s on the same site as Mikadono @PrincessKadath@ani.social.