第 10 集: Setsuna 為城市尋求充滿希望的未來，並向 Rinne 做出最終承諾
2018年9月2日 播出
Setsuna rises up to create a future for a city without hope, but tragedy strikes time and again. Meanwhile, Rinne finishes her invention and Setsuna sets out for the future to save mankind's existence. Just before he goes, Setsuna makes a promise to Rinne. (Source: Crunchyroll)