Motosu Urano, a college student and a bookworm of the highest order, loses her life in an avalanche of books and wakes up in another world as a sickly girl named Main. Nevertheless confident that she can deal with any situation as long as she has books to read, she looks all over her new home for one, but doesn't find any. To make matters worse, she couldn't see any writing in town when out with her mother Eva. She realized that she found herself in a world with a low literacy rate, one where books were prohibitively expensive.

Having learned how expensive books are in this world, Main resolves to make books of her own. However, she soon finds out just how frail her new body is when she and her elder sister, Turi, decide to go to the gate to deliver something their father forgot—she can hardly take a few steps before running out of breath. But that's when Lutz, a neighborhood kid the same age as Main, offers his help. Main is touched by this and soon makes it to the gate. There, Otto gives her his old slate, letting her experience the joy of writing once again

The season has shifted to summer, and the day of Turi's baptism has arrived. Turi attracts attention with a hair ornament made by Main. Main, who has more opportunities to go to the forest, starts making wooden tablets with the help of Lutz. Meanwhile, Lutz asks Main Lutz to let him meet Otto. Lutz had a dream of becoming a traveling merchant. However, Main, shocked by her repeated failures at making paper, collapses from a high fever before the meeting with Otto.

With Main collapses, everyone she knows comes together in a bid to save her life. But soon, she is faced with a life-or-death decision, one that she must discuss with her family.

With Fran now fully on her team, Main must then get to work on winning Gil and Delia over.

Main and the head priest set out to join the knights on a mission to take down a rampage trombe. With this being her first exposure to proper noble society, who knows what perils lie in Main's path?