Mirai Nikki Light Novel

Middle school 2nd year, Amano Yukiteru, is a boy who has problem making friends. He thinks of himself as a bystander and will always write down everything he sees in a cell phone diary. Tormented by solitude, Yukiteru began to imagine things like a friend called Deus Ex Machina who is apparently the Lord of Time & Space. Seeing Yukiteru's miserable state, Deus gives him a new ability. His diary will now record events that will happen in the near future. Yukiteru is then forced to participate in a game whose winner will become Deus' successor. (Source: MU)

Future Diary / Mirai Nikki 9th's Final Moments Sticker for Sale by Michael Heeks

Vintage Mirai Nikki Mirai Nikki Manga Art Print by Future Diary Anime - Fine Art America

Future Diary: Mosaic Manga

Manga (parte 3) •Mirai Nikki En Español• Amino

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Future Diary / Mirai Nikki Vol.5 [Blu-ray+CD Limited Edition] - Solaris Japan

I found it! Chapter 61, the epilogue to the epilogue : r/mirainikki

Minene Uryuu, Future Diary Wiki

Mirai Nikki, also known as Future Diary in its much loved anime adaptation, is a popular manga from the pen of Sakae Esuno. First published in Shonen

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Mirai Nikki: Paradox, Future Diary Wiki