Story
Devil Survivor is set in modern-day Tokyo. One day, the protagonist, a 17 year-old student, finds that he and his two friends, Atsuro Kihara, a computer hacker, and Yuzu Tanikawa, a whiny girl, have been given modified electronic device called COMPs by his older cousin Naoya. As they are exploring their purpose, an outbreak of demons occurs within Tokyo, and a large city area is quarantined by the Japanese Ground Self-Defense Forces, deny power, communications, and food to those trapped within it; the chaotic situation created vigilantes of those trapped who try to take it on themselves to fight the demons or even on weaker humans. The protagonist and his friends discover their COMPs allow them to summon helpful demons to fight the aggressive ones, allowing them to survive the attacks. The protagonist also finds he has the ability to see a person's "death clock", representing how many days a person will have left to live. While he uses it to help himself and his friends to change their own fate, the protagonist realizes that everyone within the quarantine will die within seven days.