In a world where realms collide, Harry Potter finds himself in Hueco Mundo after death-a desolate land of Hollows, haunted by dark creatures and mysterious powers. Determined to survive, Harry embraces his new Hollow abilities, commanding chains that can summon or destroy, and eventually builds a kingdom where Hollows, Arrancars, and Espada find peace. But whispers of an ancient, ruthless power rise as the Quincy re-emerge, threatening both his kingdom and the delicate alliance with Soul Society. Together with Ichigo Kurosaki and unlikely allies from both realms, Harry must face an unimaginable enemy, balancing his own humanity and Hollow nature to defend the fragile peace and protect everything he has built.