Space Orcs have destroyed Earth. Technology no longer works. Driving the world’s last working car, four girls become couriers and embark on a post-apocalyptic road trip. Action, laughs, survival, bizarre Orc-tech, and maybe even hot springs ... and ramen!? Usagi Days awaits!

Usagi Days comprises the following three arcs:
The Monster Behind Conifer Village: The girls discover the secret behind a hot spring village's mysterious working computer.
The Heist of Stonegarden Castle: The girls find themselves involved in a thief's plan to rob a massive castle, and the ruthless king who rules it.
Ruby-Coloured Days: Ruby confronts the truth about her past.

Characters
Ruby Hanasaki: Driver of the Usagi. Impulsive, fearless, and sometimes reckless.
Anemone Grayscale: The Usagi's co-driver. Somewhat reserved, compared to the others. Careful, thoughtful.
Violet Tachibana: A great cook. Cheerful, a bit scatterbrained.
Ivy Evergreen: Resident tsukkomi. Likes to read, especially manga.