The time is the Edo period. The stage is several years after the story of the previous family computer software "Downtown Special Kunio-kun's historical drama da all members gathering!" In order to clean up his best friend's false accusation, the righteous migrant "Kuniomasa" travels all over Japan with his younger brother "Tsurumatsu". Along the way, new incidents and powerful enemies will attack the politicians one after another. And the huge shadow of evil that gradually appears...