Yukemuri Disappears
The JSDF, UN, and Efy Dolgh search for Muetta. Yukina's class decide to go to Toyama Memorial hot springs at “Kenshin’s hidden residence” for the weekend. Not all end up going, only the core group of Yukina's friends. Meanwhile the wounded Muetta takes refuge at the hot springs, hoping to aid her recovery. After getting lost, Yukina and Kennosuke arrive at the same spring, where they stumble upon Muetta, and the UN takes her into custody. Just then, a Cactus unit appears, captures Yukina, and escapes back into orbit.
Aired 04/08/2016EP 18 - Yukemuri Disappears

Kuromukuro
During the construction of the Kurobe Dam, an ancient artifact was discovered, and so the United Nations Kurobe Research Institute was established. Intellectuals from all over the world gathered to study the object, and the children of those researchers attend Mt. Tate International Senior High School, including the institute head's daughter, Yukina Shirahane. In the summer of 2016, a lone samurai once again awakens!
(Source: Pony Canyon USA)