The premise hits you immediately: your phone shows you how you die, and the only escape is summoning demons to fight demons in a war you didn't sign up for. Thirteen episodes means the pacing destroys itself trying to cover what needed twenty-six, but when it lands, that ending justifies every rushed pivot. Watch it in one sitting or not at all.
An earthquake tears through the city, and Hibiki should die in the subway collapse. Instead, he walks away with two others who share his impossibility: Daichi and Io. The three quickly learn why they survived. They've been chosen as Devil Summoners, humans capable of binding demons to their will and commanding them in battle. Their mission is immediate and terrifying: aliens called the Septenriones are systematically destroying humanity, and demons are the only weapons that stand a chance against them. But this war runs deeper than simple combat. Hibiki discovers he can see how people will die before it happens, transforming every decision into a moral calculation. Do you save someone destined to perish anyway? Which lives matter when resources are limited and time keeps running out? As the three navigate a crumbling world where death arrives on schedule and every person is either an asset or a liability, they realize the real battle isn't just against the Septenriones. It's about deciding what kind of humans they want to be when survival forces you to become something else entirely.