Aspiring apprentice merchants Myne and Lutz have signed a contract with Benno, who has promised to sell their plant-based prototype. With his assistance, they finally have the materials and tools to start making their first batch of washi paper! And Benno wants to sell not only paper, but Myne's other inventions, such as the flower hairpins, as well. But getting involved in the world of merchants makes Myne's life more complicated than ever as she gets registered at the Merchant's Guild and catches the eye of the conniving guildmaster.