Infinite Dendrogram is a Japanese light novel series written by Sakon Kaidou and illustrated by Taiki. The story follows Reiji Mukudori, a young man who immerses himself in the world of the MMORPG 'Infinite Dendrogram,' a game that boasts infinite possibilities and realistic NPCs. As he navigates this expansive digital landscape, Reiji encounters challenges and adventures that test his skills and resolve. The series explores themes of virtual reality, friendship, and the blurred lines between the real and digital worlds.