You’re a 14-year-old, shy and daydreaming loner who observes life and jots down the events on your cell phone. Your only friends are Deus Ex Machina, the God of Space and Time, and his assistant Muru Muru. Deus transforms your phone into a Future Diary, capable of predicting the future up to ninety days. You discovered, you and eleven others are part of a battle royale survival game orchestrated by Deus. The aim of this game is to eliminate the other diary holders, the winner to succeed Deus as god and prevent the Apocalypse. You find yourself protected by Yuno Gasai, a charming but psychopathic classmate who obsessively stalks you after you have promised to go stargazing together a year before.