The drama will use an original story that differs from the manga, revolving around 12 people who obtain a “future diary,” which allows them write down “predictions” of the future that will come true. However, they are all part of a game of survival, in which they must use their diaries to try to kill each other and be the last one remaining, earning a place on the “God’s seat.” Okada plays Hoshino Arata, a lazy college student who doesn’t believe in spending effort or working toward the future. One day, he gets a diary (the “future diary”) on his mobile phone, and he becomes involved in the game of survival.