In 2043, <Infinite Dendrogram>, the world's first successful full-dive VRMMO, was released. Along with its ability to perfectly simulate the five senses and many other remarkable features, the game promised players a world of infinite possibilities. Nearly two years later, soon-to-be college freshman Reiji Mukudori finally buys a copy and begins playing. With assistance from his experienced older brother, Shuu, and his partner Embryo, Reiji sets off on an adventure into the world of <Infinite Dendrogram>. What will he discover and encounter in this game world, renowned for its incredible realism and infinite possibilities?