The newly opened gallery café Gold Coin is a huge hit with the locals thanks to the savvy manager and waitress running it.

Meanwhile, the café's owner Mitsuha is going on an undercover mission to the New World. Disguising herself as a foreign noble/royal, a sweet innocent fan of the navy, and even as the Envoy of the Goddess, Mitsuha gathers intel and spreads disinformation, sowing her seeds for future invasion.

Joining forces with a young and ambitious local merchant, Mitsuha plots to tip Vanel's economy with Earth's spoils: sugar, spice, and other nice but useless foodstuff.

Dodging pushy nobles, meeting the King of Vanel, and introducing a new business plan to Yamano County, the world-jumping heroine is on the fast track to becoming...the head of a secret evil economic empire?!