Planet Seven

The princess of the United Planets has run away from home on the "Seventh Planet," where pure Japanese-style Edo row houses stretch on forever! Hanzomaru, a curious three-headed samurai, Ogin, a sharp-tempered grocer, and Ojiro, a stoic assassin. The fuss over the residents, who are all a little too lazy and sketchy, unfolds in this story. What is the fate of the reborn princess "Oden"?

(Source: Kadokawa, translated)