The world will never be the same again. An unprecedented and grand historical event—the flash of a supernova—marks the beginning of a new era. The star’s radiation will kill everyone over the age of 13 within a year. Is it possible to prepare children for independent life in such a short time? What will the new world be like? Adults have always associated childhood with kindness and peacefulness. However, they could not even imagine that in less than a year after the start of the Supernova Era, children would find themselves plunged into the depths of a new world war.