"Just as Shiro's settling in to his peaceful life as a merchant in Ninoritch, he is rocked by the news that the grandmother he believed to be long deceased is, in fact, very much alive. What's more, she's apparently somewhere in Ruffaltio, the fantastical world Shiro can visit through his closet. This discovery gives him a new objective: find her and ask her why she's been pretending to be dead all these years. But rather than going on a wild goose chase in search of her, he decides to stay in Ninoritch in the hopes that she'll visit for the annual harvest festival. In the meantime, the Blue Flash adventuring party asks for Shiro's help in gathering some rare medicinal herbs, a quest that takes him to the sprawling forest just outside town. But when he ends up separated from the group, he finds himself relying on the help of a mysterious girl . . . Just who is she? And why is she so tiny?"
"After quitting his job at a toxic company, Shiro Amata moves into the house his grandmother left him in her will. There, he soon makes two life-changing discoveries: one, his grandmother was really a witch from another world, and two, said other world is just on the other side of her closet door! Thanks to a book she left for Shiro, he also manages to obtain an all-powerful skill called 'Equivalent Exchange,' which allows him to turn money from his world into otherworldly currency and vice versa.
With this, Shiro decides to set up shop and sell convenient items like matches to the colorful inhabitants of the other world. His plan: make a massive profit on the goods he brings from home to become so rich that he never needs another job ever again!"
