The Future Diary is een Japanse animeserie van de zender CTC (JA). De serie ging in première op 9 oktober 2011.
De middelbare scholieren Yukiteru Amano teistert het gevoel van eenzaamheid. Alleen de denkbeeldige wezens Deus Ex Machina maakt Yukiteru samenleving en verklaarde dit, dat hij de God van tijd en ruimte was. Deus Ex Machina gewijzigd Yukiterus naar de mobiele telefoon, zodat het voorspelt de toekomst van de eigenaar in een mobiele dagboek. Maar na Yukiteru de eigenaar van de nieuwe telefoons is, heeft hij samen met andere gekozen dagboek eigenaren in een spel op leven en dood om deel te nemen aan Machina aan het eind van de opvolger van Deus Ex, waar hij actief wordt ondersteund door zijn klasgenoot Yuno Gasai.
In a flashback, Yuno is revealed to have murdered her parents, who used to discipline her harshly for failing to meet their standards. After she fell in love with Yuki, he became her sole reason to live. Yuki asks Deus to bring his mother back to life, but he reveals that he is dying and his powers have faded. Furthermore, unless a successor is determined soon, all existence will collapse. When Yuki's father returns home, Yuki, who knows he killed his mother from his diary, demands that he turn himself in. However, his father points out that he has no evidence. The next day, Yuki goes after his father, expecting him to lead him to evidence. However, it turns out that Yuki's father wanted to visit the site where his family was going to go stargazing before he turned himself in. As Yuki reconciles with his father, they are ambushed by agents of Eleventh and Yuki's father is murdered. Enraged, Yuki fights back and manages, with Yuno's help, to kill the attackers. Afterwards, Yuki declares that he is now determined to win the survival game in order to attain the power to resurrect his parents. When he tells Yuno this means he has to kill her, she calmly replies that she is ready to die for him at any time.