Chako is a robotic cat that was abandoned by her old owner and left for scrap. She was about to be thrown into molten lava when Luna&#039;s dad rescued her and rebuilt her to give to Luna as a present. At first, Luna hated Chako. She later found out that she and Chako had a lot in common, and gradually warmed up to her. Chako originally got onto the field trip space ship by sneaking her way aboard. She helps Shingo out with most of the electronic and technical problems.     (Source: Wikipedia)

In the future, most of mankind lives in artificial space colonies, climate-controlled and completely safe. The orphan girl Luna, selected to receive a scholarship at the prestigious Soria Academy, finds herself in quite different circumstances. An excursion gone terribly awry leads to Luna and her classmates being stranded on an uninhabited planet. Without any experience of untamed nature, the motley crew is faced with a challenging struggle to stay alive until rescue comes. If it comes...
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(Source: Anime News Network)