Aetheria: The Realm of Seven Crowns

Eleven high-school students are summoned by Valedorn into Aetheria, a fractured world of seven kingdoms, ancient powers, and rising demonic corruption. Gabriel Howard, a martial arts master skilled in karate and jujutsu, hides his fear and feelings behind a class-clown persona while navigating a dangerous political summons. As the kingdoms prepare for war and the Black Crown seeks the World Core, Gabriel and the other students must survive, decide whom to trust, and choose whether to unite Aetheria or reshape it.