"Yukiteru Diary" is a central element in the anime and manga series "Future Diary" (Mirai Nikki). It is a diary that belongs to the protagonist, Yukiteru Amano, which can predict future events related to his life. This unique ability makes it a crucial tool in the survival game he is forced to participate in. In this survival game, twelve participants, each with their own special diaries, must eliminate one another to become the new god of time and space. The series explores themes of fate, love, and betrayal as Yukiteru navigates the challenges posed by other diary holders, including his complex relationship with Yuno Gasai, a fellow participant.