双月之城
Chinese sci-fi animation
https://baike.baidu.com/item/%E5%8F%8C%E6%9C%88%E4%B9%8B%E5%9F%8E/17945180
https://www.artstation.com/twinmoons
https://www.youtube.com/channel/UCchiVGmoRyVbNhl2eTA9s2Q
https://www.bilibili.com/bangumi/media/md3588/

[[Sakura Sora]] aka manabi is one of the artists who worked on this
twin moons