The Minth's treasury.
At first, Yuuta thought that the place seemed familiar, with the pristine white backdrop and a few unfamiliar objects that were displayed, or rather, scattered throughout the entire room. Unknown weapons and suits and clothes were all lined up on different corners of it. Inside the treasury were a couple of Minths as well, strolling around and giving their signature salutes towards each other every time they met. They didn't really have anything to do in the treasury except stroll around and guard it so they made it a hobby to salute each other for fun.
That's why when Yuuta and Fghje entered the room, they all slightly panicked, thinking that the King itself came to check up on them. To their relief, it was just one of the King's Personal Guard and an esteemed human guest. They all sighed in relief.