In 2043, Infinite Dendrogram, the world's first successful full-dive VRMMO (Virtual Reality Massive Multiplayer Online RPG), was released. Beyond its capacity to perfectly simulate the five senses and its numerous other impressive features, the game promised players a world brimming with infinite possibilities. Nearly two years later, Reiji Mukudori, a soon-to-be college freshman, finally manages to purchase a copy and begin playing. Assisted by his experienced older brother, Shu, and his partner Nemesis, Reiji sets off on an adventure within the world of Infinite Dendrogram. What exactly will he discover and encounter in this game world, renowned for its incredible realism and boundless potential?