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?!

Get that 2 billion yen for an easy retirement! And look at that—there's a little cutie tagging along! Having lost her family to a freak accident, eighteen-year-old Mitsuha Yamano was left to fend against the harsh world all on her own. She was at a loss, thinking about her future, when a mysterious entity gave her the power to jump between worlds. How will she wield it...? While at times Mitsuha can be a huge ditz, she's a tough nut to crack. She begins using all the modern tools and knowledge at her disposal to carve her own path in this money-making fantasy set in a medieval world!

Mitsuha and her hired mercenaries, Wolf Fang, have just about wrapped up their battle against the invading Imperial Army and its monsters, wyverns, and dragons. And what awaits Mitsuha as a reward for her efforts but her very own viscounty! She's now a noble landowner in the other world at 18 years old?! So much for just trying to make gold for her retirement...

Mitsuha is your average teenage orphan-until one day she falls off a cliff, and finds herself in another world strangely akin to medieval Europe! Beset by wolves, she discovers she has the ability to travel freely between the two worlds, and decides to make a life for herself in both. Now all she needs to do is save up 80,000 gold coins for a comfortable retirement... Piece of cake, right?! No matter how out of control things get, Mitsuha keeps her cool, turning every hurdle into a business opportunity. From shopkeeper to war hero to viscountess, her meteoric rise seems unstoppable-but with each success comes new obligations and new costs. Does every step up just take her further from her goal??

Joining forces with the ambitious merchant Lephilia, Mitsuha is on a roll in the New World. But now their inventory's been stolen by a jealous rival! She's not letting them get away, though. It's payback time-with the cunning use of her world-jumping ability, of course. In this volume, our heroine is cooking up even more storms: an exclusive club for young noble girls, a manmade island, and a new kind of weapon that'll knock a boy's socks off?! Sure, saving up gold coins for her retirement is important, but right now, Viscountess Mitsuha von Yamano is amped up to undermine her enemy and strengthen her own county's and kingdom's economic power like a full-fledged ruler!

Mitsuha Yamano falls off a cliff, at which point she finds herself transported to some sort of medieval European fantasy world! While there, during a battle with some wolves that almost costs her her life, she realizes that she has the ability to come and go between Earth and this new world. Mitsuha decides to use this ability as much as she can. Why? To save up for retirement, of course! She sets her sights on saving eighty thousand gold coins--and this is the story of her schemes to get there!

After turning the lower city into a true sight to behold, Rozemyne aims to continue her development plan and secure a greater influence over the country’s other duchies. As she needs the assistance of commoners to achieve this, she gets to work dismantling the wall that exists between them and the nobles. She tours the printing workshops in the Central District, holds a dyeing competition to unearth skilled craftspeople, and even fantasizes about designing her own library. Not everything is quite so straightforward, however—a normal wedding is enshrouded in complex interduchy politics, and as Rozemyne prepares for her second year in the Royal Academy, she finds herself needing to stay on guard against the rebellious former Veronica faction. This is the newest volume of this biblio-fantasy, filled to the brim with moving developments! Includes two original short stories and four-panel manga by You Shiina!