The original project of the young studio Lay-duce.During the character design artist responsible ranobe "My little sister can not be so cute" Hiro Kanzaki. Distant future. Humanity has so far only tends to space and pioneering spirit reigns everywhere. In the solar system planets, one after another, new city and have a lot of people calling their home.At one of these planets - Mars, dotted with settlements of various states, and the story unfolds. The new Japanese prefecture of Tokyo fourth working seniors meet their youth.