In a world where dead people turn into books and are stored in the Bantorra Library where anyone who reads a book can learn their past. Bantorra Library is maintained by Armed Librarians who wield psychic powers and their enemy is a religious society known as Sindeki Kyōdan.
Junior High student Jimon Asuta is in a fix. He had a big fight with his dad and was kicked out of the house. With no money and no place to live he shares the last of the food with an unusual little girl he encounters. It turns out she is Venera the Great, the leader of the secret organization Zvezda and committed to conquering the world. At first he thinks it is just a little girl's fantasy, but strange events with weird technology soon prove that Zvezda is, in fact, for real.
Haruka Kasugano and his twin sister Sora have lost both their parents in an accident, and with them all their support. They decide to move out of the city to the rural town where they once spent summers with their late grandfather. At first everything seems familiar and peaceful, but changes come as Haruka starts to remember things from his youth.