Ash, a young boy with apparent past-life memories, sets out to revolutionize the world in order to rebuild civilization and create his ideal life! Together with his friend Maika, they aim to develop their new world starting with a village!
A young woman who loves books dies and is reborn in another world as Myne, a sickly child from a poor family. Worst of all, there are almost no books in this world! So Myne decides that she'll just have to make her own and become a librarian.
Kouki has found himself reborn, with many of his past-life memories, in an alternate version of Japan. Every time he uses his knowledge from his past life, he goes from one misunderstanding to another in this insane sci-fi comedy!!