High School Prodigies Have It Easy Even in Another World!, Vol. 8 (manga) — Riku Misora

As the day of the goss currency exchange draws near, it's finally time for Masato Sanada, Earth's greatest businessman, to show this new world what he can really do. With no way to get the gold the Republic of Elm needs to mint coins, will his powers of negotiation and lateral thinking be enough to turn the tables on the countries working against him? But Elm's troubles are not limited to the realm of finance -- the reemergence of the Yamato Empire forebodes not only renewed tensions with Freyjagard but domestic strife as well...