Does anyone read Mirai Nikki?
Here's a summary about it:
Yukiteru always rejected any offers to go with friends and just keeps writing a diary on his cell phone. He has what he believes is an imaginary friend called Deus Ex Machina. However, one day Deus asks him to play a survival game along with eleven others. The winner becomes the next Deus Ex Machina. In order to win, the contestants must use their diaries of the future to eliminate one another. For Yukiteru to survive, he must team up with another diary holder, a girl named Yuno.
Each player is assigned a number based on the order that Deus modified his or her diary. The diaries begin to record the future in the same manner their future selves would have written down events, with some even being able to influence the beings whose future they divulge to the owner; the only exception to this rule is when the holder reaches a Dead End, a time when their lives would be finished without significant intervention. Each diary varies in its properties and functions depending on the owner's personality, occupation and lifestyle and they all have their shortcomings. The diaries can be used without the owner's consent should they fall into another's hands. Since the diaries are written from the perspective of the owner's future self, the future can still be misinterpreted and thus the entries can become inaccurate. In addition to killing someone through normal means, if a diary is destroyed or broken, the owner also dies.