"Future Diary" is about a lonely 14-year old boy named Yukiteru "Yuki" Amano who has no friends and spends his time writing a diary on his mobile phone. One day, Deus Ex Machina, the God of Time and Space, give Yuki's diary the power to predict the future, but warns Yuki that if his diary is broken, Yuki will die. Yuki is at first happy about knowing his own future, but a girl in his school named Yuno Gasai reveals she also has a Future Diary. Yuno is madly in love with Yuki, often stalking him, and her phone predicts everything he will do.