The Asterisk War

"The Asterisk War: The Academy City on the Water" (Japanese: 学戦都市アスタリスク, Hepburn: Gakusen Toshi Asutarisuku) is a Japanese light novel series written by Yuu Miyazaki and illustrated by Okiura. Set in the 21st century, a cataclysmic event known as the "Invertia" devastated most of Earth's cities and led to the emergence of humans with superpowers called "Genestella". In the city of Rikka, also known as Asterisk, six academies host tournaments called "Festa" where Genestella students compete. The protagonist, Ayato Amagiri, arrives at Seidoukan Academy in Asterisk in search of his missing sister. There, he meets Julis-Alexia von Riessfeld, the "Witch of Resplendent Flames," and becomes entangled in various events and conspiracies. The series has been adapted into manga, anime, and a video game. The anime aired for two seasons from October 2015 to June 2016. The series is praised for its action sequences, character interactions, and world-building.