Anime adaptation of the smartphone strategy game.
The isekai strategy role-playing game is set in a world where dimensional gates suddenly appeared in the skies, opening portals to countless dungeons. The story imagines if the player is a company president who employs adventurers to take on dungeons filled with monsters for the treasures that lie within. The player "recruits" or trains fighters, mages, knights, hunters, rogues, and other classes of employees, and then dispatches the employees into battles.
(Source: Anime News Network, edited)