High School Prodigies Have It Easy Even in Another World!, Vol. 5 (light novel)

The High School Prodigies have established the Republic of Elm and solidified its
foundation by issuing currency. However, just as they are about to return rule over the
country to its people via an election, Princess Kaguya of the ruined Yamato Kingdom
makes her entrance! Invoking Elm's founding doctrine, "Equality for All," she begs the
prodigies to deliver her people from the harsh yoke of the Empire. Tsukasa's decision
to get involved instead of working to return home proves to be a device one,
however...