22nd century. A virus "Infoternum" has infected humans globally to the point where it has become uninhabitable even with hazard suits. A selection of humans have since been sent into space to take refuge in arks. Meanwhile, a group of robot staff lead by acting manager Yachiyo (also a robot) continues to keep Hotel Gingarou in Ginza...

Innocent First Prince Bojji can't hear or speak and so is ridiculed by the citizens. One day he meets a rude creature named Kage who somehow understands him while robbing him of his valuables. Despite that Bojji is happy to find someone who could understand him and decides to follow Kage's orders, returning every day to let Kage steal...