Teikoku no Haishin is a sequel to Kyōran no Ginga: Schwarzschild. The events of the game take place in 3964, four years after those of the previous game. Natural disasters and the military strategies of the Honsha Empire have turned the Jiro star cluster region into a realm of chaos and unrest. A new kingdom was established in the Somari star system, and was denied a peaceful existence following the combined military actions of the countries Lossaria and Tristia. The player must defend the kingdom and win the upcoming war.