In this Future Diary side story, Muru Muru accidentally erases Yuno Gasai from the timeline, pulling the Second diary holder out of Deus Ex Machina's survival game. To keep the contest from collapsing, Muru Muru steps into Yuno's role herself, while Aru Akise, the detective who never held a diary, stands in for an injured Yukiteru Amano. The same lethal game runs again with substitutes whose methods and tempers have little in common with the players they replace.