A year and a half has passed since Kinnikuman won the Survivor Match for the Kinniku Throne and was crowned the 58th Great King of Planet Kinniku. Having left Earth to assume his royal duties and marry his fiancée, the universe finally appears to be at peace. Terryman, Geronimo, and the other Justice Choujin continue their duties protecting Earth, and a historic peace treaty is prepared to be signed by the Justice, Devil, and Perfect Choujin factions, formally ending their long-standing conflicts.

The fragile peace is shattered when a new and powerful faction suddenly appears. Calling themselves the Perfect Large Numbers and led by the imposing Strong the Budo, these Perfect Choujin reject the authority of Neptuneman, who had signed the treaty on their behalf. Declaring that the weak have no right to exist, they launch a surprise attack, severely wounding Geronimo and forcing Terryman into a desperate fight. The first battle pits Terryman against the gargantuan Max Radial, a brutal fighter known as the Perfect Ripper whose tire-studded body shreds opponents. Terryman ultimately wins through sheer determination and ingenuity, but the victory is hollow when Max Radial commits suicide according to Perfect Choujin law, which mandates death for any warrior who loses a match. This shocking act forces the Justice Choujin to confront an ideology that views wrestling as a fight to the death rather than a path to mutual understanding.

As the Perfect Large Numbers prepare to expand their challenge, they fire themselves from a giant weapon to land at six locations around the world: the Grand Canyon, Ryogoku Sumo Hall, the Brandenburg Gate, the Great Wall of China, Red Square, and the River Thames. These sites become Duel Rings where the Idol Choujin are expected to fight or else be considered surrendered. With most Justice Choujin still in medical suspension recovering from previous wars, Kinnikuman abandons his kingly responsibilities and returns to Earth to accept the challenge, heading to the Sumo Hall to face the mysterious Peek-a-boo. Just as Terryman tries to follow Kinnikuman to the other rings, he is intercepted by five cloaked figures. These figures reveal themselves to be the original Seven Devil Choujin, including Buffaloman, Black Hole, and Stecasse King. However, rather than fighting alongside the Justice Choujin under the new peace treaty, they declare that they are fighting for their own reasons, opening a second front against the Perfect Large Numbers.

The first stage of the tournament unfolds across the globe. In the USSR, Stecasse King uses his Miracle Backpack filled with tapes of past fighters techniques against Turboman. In China, Black Hole employs his mysterious spatial abilities against Dalmatiman. In London, Atlantis battles on the Thames against Marlinman. In Germany, Mr. Khamen faces Crushman. At the Grand Canyon, The Mountain takes on Strong the Budo himself. Each match reveals the brutal stakes of the conflict, where defeat means death, and each fighter must decide what they are truly fighting for. As the battles rage, it becomes clear that these Perfect Large Numbers are merely the first wave of a larger threat known as the Perfect Origin, and that the true conflict over the very definition of what it means to be a Choujin has only just begun.