An unknown disaster descends upon the land, changing its terrain. People's cries and screams, and the sounds of monsters biting and chewing, make the scene resemble the end of the world. After several years, humanity gradually gains the upper hand. Countries establish cities called Esper Cities on land created by the disaster. At the same time as the disaster, people with supernatural abilities also appear. A boy who survived the disaster searches for his sister, whose life or death remains unknown…
