"The Future Diary" is a Japanese manga series created by Sakae Esuno. It follows a high school student named Yukiteru Amano, who discovers that his diary can predict the future. This ability draws him into a deadly survival game involving other diary holders, each with unique powers. The story explores themes of fate, survival, and morality as Yukiteru navigates the challenges posed by the other participants, including the enigmatic Yuno Gasai, who becomes both an ally and a threat. The series has been adapted into an anime and a live-action film, gaining a dedicated fanbase.