It was serialized in Kadokawa Shoten's Shōnen Ace between January 2006 and December 2010, and has been collected into 12 tankōbon volumes.

Yukiteru Amano (天野雪輝) is a 14-year-old, shy and daydreaming loner who observes life and jots down the events on his cell phone.

Yukiteru discovers he 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, and in doing so, succeed Deus as god and prevent the Apocalypse.

Yukiteru finds himself protected by Yuno Gasai (我妻由乃), a charming but psychopathic classmate who obsessively stalks him after they had promised to go stargazing together a year before.

Later, Kurusu betrays Yukiteru and Yuno when he discovers his bed-ridden son is suffering from a terminal illness.

He and Yuno target the remaining diary holders, Minene, Bacchus, and Kamado Ueshita who runs an orphanage.

Wanting answers, Aru confronts Deus who reveals the boy is an artificial human designed to observe the game and keep it in balance, but confirms there is a conspiracy around Yuno.

Yukiteru died and Yuno won the game in another timeline but discovered not even the power of a god could bring back the dead.

Yuno, unable to kill Yukiteru, traps him in a dream world where she does not exist, and attacks her alternate self.

Future Diary follows Yukiteru "Yuki" Amano, a socially awkward boy and one of the game's competitors who only wants to survive; Yuno Gasai, another player of the game and a friend who would do anything to be with Yuki; Minene Uryū, an infamous terrorist with a grudge against God; and Aru Akise, a genius teen detective and a friend of Yuki who investigates the true purpose of the game and Yuno's dark secrets.

The manga was serialized in Kadokawa Shoten's Shōnen Ace magazine from January 26, 2006 to December 25, 2010[3][4] and was compiled into 12 volumes published by Kadokawa Shoten, plus two side-story manga, Future Diary: Mosaic and Future Diary: Paradox, compiled in one volume each.

[6] An anime television adaptation by Asread and directed by Naoto Hosoda began airing from October 10, 2011.

[10] An original video animation episode titled Future Diary: Redial acts as an epilogue to the television series.

An 11-episode live action drama titled Future Diary: Another:World aired between April 21 and June 30, 2012 on Fuji TV.