Isekai Tensei Dungeon Master: Onsen Dungeon wo Tsukuru

After being unexpectedly reincarnated into a fantasy world, the protagonist is handed a highly unusual mission: to serve as a dungeon master. Rather than commanding monsters or hoarding treasure in a traditional labyrinth, this newly appointed overseer is tasked with creating and managing an entirely unique establishment—an onsen dungeon. This extraordinary domain operates under its own set of rules, where conventional boundaries do not apply and anything goes within its steaming, magical confines. The primary objective revolves around providing restorative care to weary adventurers, particularly female knights who arrive battered from their quests. Within the therapeutic waters of this specialized dungeon, these warriors are encouraged to shed their heavy armor and clothing so they can be properly healed and rejuvenated by the hot springs' mystical properties. It is a sanctuary unlike any other in the realm, blending relaxation with essential recovery for those who protect the world above. As word of this remarkable haven spreads, the responsibility placed upon the dungeon master grows ever larger. To accommodate the increasing number of visitors seeking solace and healing, the ultimate goal becomes clear: continuously expand the dungeon's facilities. By developing new baths and enhancing the onsen dungeon's reach, the protagonist must transform this unconventional project into the most renowned sanctuary in the entire other world.