Though the manga was very well written and illustrated, this adaptation was very insulting to it. The story was rushed and contained very few connections to the manga. Many of the important characters did not even appear in the anime. Many of the important story points were also absent. Earth barely had a cameo even though it was where half of the story took place. The ending, though less sad, is still far from the manga. Overall, if you have read the manga and loved it, stay away from this OVA.