天空之城（2022）

A city designated as an environmental conservation area, located in what was once called Shinjuku Ward, Tokyo. Sora Citya. This futuristic city was truly an ideal metropolis. However, there was just one single obligation imposed upon the residents of Sora Citya. That was to never, under any circumstances, venture outside the walls. Of course, entering from outside the walls was also forbidden. To live completely cut off from the outside world, entirely isolated within these high walls—that was the condition for residing in this ideal city, Sora Citya. And to ensure that future generations would not develop an interest in the outside world, speaking of anything beyond the walls was considered taboo.