In the story, a mysterious giant tank rocket begins stealing resources from various planets. On Earth, http://anidb.net/ch18273 [Yuuna] and Boogoo get involved in the incident and disappear. In order to save Yuuna, http://anidb.net/ch18272 [Stitch] teams up with Tiira, an information analysis robot from the Galactic Federation.
Source: ANN
