Urano, a young Japanese soon-to-be librarian, dies in an earthquake. She is reincarnated in another world as a young girl named Mayne, but learns that books are scarce and only provided to ...

The story takes place in an alternate reality where a small percentage of children manifest superhuman abilities upon reaching puberty. A focus is placed on Yuu Otosaka, a high school boy who awakens the ability to temporarily possess others, which brings him to the attention of Nao Tomori, the student council president of a school founded as a haven for children with such abilities.

A gambling prodigy comes to an elite school run by games and turns the order upside down.