Mirai Nikki - Mosaic

In this compact 2010 one-shot from Casterman, Mirai Nikki - Mosaic expands the universe of the survival game manga with a new, self-contained story. Written and illustrated by Sakae Esuno, it offers a focused glimpse into the larger mythology without requiring knowledge of the main series, making it an accessible entry point for newcomers and a neat bonus for existing fans.