Makoto Yukimura’s Planetes (Japanese: プラネテス, Hepburn: Puranetesu, Ancient Greek: Πλάνητες Planētes) is a Japanese hard SF manga. 2016’s Planetes Omnibus Volume 2 collects all of the Planetes material that was not included in Volume 1 (reviewed here). Some of this is bonus backstory, some of it tells readers what came next for the protagonists.
In Volume 1, the crew of the DS-12 Toy Box—Hachirota “Hachimaki” Hoshino, Fee Carmichael, Ai Tanabe, and Yuri Mihairokov — took a break from scouring the skies for deadly orbital debris in order to save the day from the Space Defence Front1. That adventure over, all that remains is getting on with the rest of their lives.