"First published in Japan in 2018 by Hobby Japan, Tokyo."--Colophon.

In a world of infinite possibilities, how would you choose to live?

The City of Duels is Heating Up! A challenger from Huang He comes to duel Figaro, the local legend. As luck would have it, Ray just so happens to have a front-row seat! Both of these Masters wield powerful Superior Embryos and have no intention of losing. Who will be left standing at the end of this ferocious encounter? As the duel comes to a close, a shadow looms over the city of Gideon. Mr. Franklin, the Giga Professor from the Dryfe Imperium, makes his terrifying debut! The sadistic scientist sets his sights on throwing the city into utter chaos. Unfortunately for him, Ray, Marie, and Rook aren't about to go down without a fight! Outmatched, outnumbered, and outsmarted, the knights and Masters of the Kingdom of Altar swiftly prepare to retaliate. Will their fighting spirit be enough to defeat this mastermind?

The trouble with full-on MMO's is that there's always some overpowered nutcases who can show up and wreck things. It seems like Infinite Dendrogram is no different, with a set of four in the Kingdom of Altar alone! Having previously been PK'ed out of the game, Ray continues his quest to level up and press ahead, But in the background, political maneuverings cause the game's top players to make their presence known.

After an unexpectedly challenging journey, Ray and his party finally arrive at Gideon, The City of Duels. The mere sight of the towering arenas and thriving fantasy townscapes is enough to instantly awe and enchant him. However -- like anything that stands tall and proud -- the city cast a great, dark shadow. The name of this shadow is the Gouz-Maise gang -- a loathsome band of cutthroats who turn their profit kidnapping children and demanding ransom. Ray, wide-eyed and innocent, was blissfully unaware of just how cruel the hyper-realistic world of Infinite Dendrogram would become.

Ray finds himself kidnapped by The Lunar Society, and is approached by their spiritual leader and the last Superior of the kingdom -- High Priestess, Tsukuyo Fuso, who begins to unfurl her nefarious scheme.

In the year 2043, Infinite Dendrogram, the world's first successful full-dive VRMMO was released. In addition to its ability to perfectly simulate the five senses, along with its many other amazing features, the game promised to offer players a world full of infinite possibilities. Nearly two years later, soon-to-be college freshman, Reiji Mukudori, is finally able to buy a copy of the game and start playing. With some help from his experienced older brother, Shu, and his partner Embryo, Reiji embarks on an adventure into the world of Infinite Dendrogram. Just what will he discover and encounter in this game world known for its incredible realism and infinite possibilities?

The curtain may have fallen on the King of Orchestras, but Franklin’s game is only just warming up. In order to save the City of Duels, Ray and his companions will now have to face an old ally—the Magingear pilot Hugo Lesseps—and unravel the enigma of his Embryo’s icy powers. And that’s not nearly the last trick the Giga Professor has up his sleeve... When sinister schemes clash with unwavering conviction, who will emerge victorious?

The City of Duels remains under siege, and Gideon's peace has been shattered by the malicious machinations of Giga Professor Franklin! As Ray and Rook draw ever closer to a fateful showdown with a former friend, Marie moves in hot pursuit of the dastardly fiend, only to be stopped in her tracks by Veldorbell, the King of Orchestras. Pushed to the brink, she has no choice but to play her full hand and reveal her biggest trump card... But what kind of catastrophic consequences will this artistic clash have for the city at large?

Who needs peace and quiet when you have games to play? Ray's climb towards becoming a super paladin continues, but it's never as easy as anyone hopes. Ultimate Boss Monsters, cursed costume pieces, and positively mad penguin are just some of the grinds in his way ⁠— and that's not even including the dread specter of gacha mechanics. Can Ray keep his in-game life ⁠— and dignity ⁠— intact, or is he just another cog in the machine of Infinite Dendrogram?