Season 4

Shinpachi, the son of a sushi chef, is busy preparing mysterious fish for the local customers. Haruko disguised as a hostess, visits the restaurant with the mayor, followed by a Medical Mechanica robot who threatens to destroy the planet.

In order to save Shonari from a miserable situation, Dainari works hard to buy a ticket to another planet, however he sustains injuries from a yakuza fight. Haruko to the rescue or so he thought but she only makes a chaotic situation worse.

Orinoko's father is a swordsmith, whose skills have rusted with the devastation of the city. In order to help, Orinoko rummages for scrap irons, and she meets Haruko who's also collecting irons to repair her Vespa, but what is her motive?