Urano Motosu loves books and has an endless desire to read literature, no matter the subject. She almost fulfills her dream job of becoming a librarian before her life is ended in an accident. As she draws her last breath, she wishes to be able to read more books in her next life. As if fate was listening to her prayer, she wakes up reincarnated as Myne—a frail five-year-old girl living in a medieval era. What immediately comes to her mind is her passion. She tries to find something to read, only to become frustrated by the lack of books at her disposal. Without the printing press, books have to be written and copied by hand, making them very expensive; as such, only a few nobles can afford them—but this won't stop Myne. She will prove that her will to read is unbreakable, and if there are no books around, she will make them herself! [Written by MAL Rewrite]

When Myne learns that the Holy Church is in need of mana for their relics, she sees it as her chance to be cured of her life-threatening mana disorder. After seeing their bountiful library, she throws herself headfirst into the Church's grasp and begs to join their order. In exchange for her service and her unusually bountiful supply of mana, Myne is given the blue robes of a noble-born apprentice priestess, despite being a commoner. To Myne, all this talk of mana and nobility is trivial, as she now has access to an unlimited supply of books! As Myne transitions into the next phase of her life in this new world, she soon learns that achieving her dream has come at a heavy cost. Noble society is severe, unforgiving, and fueled by politics and neglect. She must now deal with the class conflict between the noble-born blue robes and the common-born grey robes, the High Priest's attempts to oust her, and constant behavioral issues from her new retainers. With the help of her family, friends, and the enigmatic Head Priest whose loyalties and motives remain unknown, Myne seeks to overcome these obstacles and continue on the path to becoming her ideal self—the ultimate librarian! [Written by MAL Rewrite]

Now branded for death and destined to be hunted by demons until the day he dies, Guts embarks on a journey to defy such a gruesome fate, as waves of beasts relentlessly pursue him. Steeling his resolve, he takes up the monstrous blade Dragonslayer and vows to exact vengeance on the one responsible, hunting down the very man he once looked up to and considered a friend. Along the way, he encounters some unlikely allies, such as a small elf named Puck, and Isidro, a young thief looking to learn swordsmanship from the former mercenary. As the ra group slowly comes together after having decided to join Guts in his quest, they will face incredible danger unlike anything they have ever experienced before. [Written by MAL Rewrite]

Demons have now become commonplace around the kingdom of Midland, which has fallen into chaos. The swordsman Guts still cannot stay in one place for long due to his demonic brand. He could always manage to protect himself when he was alone, but now he has the added challenge of protecting former Commander Casca, a shell of her former self who neither remembers nor trusts him. They never have a moment's rest with the constant threat of demons, and they need a place where Casca will be safe till they find a way to heal her. Their elf ally, Puck, tells of the mystical land of Elfhelm, which is supposed to be a safe haven from the demons that ravage the lands. Tired and with only a vague hope, they struggle on to find a place to live—and they still need to find those responsible for the madness they are forced to endure. [Written by MAL Rewrite]