The first round of the Annihilation Tournament begins!!! A martial arts tournament to decide the strongest corporation and fighter in Japan has begun!!! 32 fighters and 32 corporations clash with their pride and interests on the line... Which one will win...!!?? The tournament bracket is announced... And the unmissable first round is finally underway!!!

Public combat sports vs. underground martial arts... Who will win the final match of Round 1? There are two matches left in the first round of the tournament!! Kaolan Wongsawat, the heavyweight boxing champion, clashes with Kaneda Suekichi, the man who fought for his place in the tournament! Then, the "King of Combat," MMA champion Okubo Naoya, faces off against "The Fang of Metsudo" Kanoh Agito, who has reigned as emperor over the Kengan Association. A fight for the "strongest," fitting for the last match of Round One, begins!!

Who is the strongest? All the tournament entrants have arrived! A martial arts tournament to decide the strongest corporation and fighter in Japan has begun! Judo fighters, pro wrestlers, riot police, mixed martial artists, sumo wrestlers, mercenaries, serial killers, classical martial artists, etc. 32 fighters who believe in their own strength, and the 32 corporations that hired them, clash with their pride and interests on the line!!!!

The second match of the first round of the Annihilation Tournament begins! The most powerful shut-in, a giant fighter who reigns over the gaming industry: Kono Haruo, a.k.a. "The Destroyer." Facing him is a merciless riot police officer who seeks justice by any means: Akoya Seishu, a.k.a. "The Executioner." These fighters who claim to be the strongest clash with their pride on the line!!

The first round of the tournament has finally entered the final block! Who won the seconds-long match between "The Floating Cloud" Hatsumi Sen and "The Faceless Man" Chiba Takayuki...? This is followed by the bloody duel between "The Dissector" Hanafusa Hajime and "The Bloody Tusk" Bando Yohei. More mixed martial arts, cross-industry battles of pride are about to begin!!

The timid old man Yamashita Kazuo has found himself caught up in a ring of marital arts matches where corporations wager massive profits on martial arts fights between hired fighters. They are called the Kengan Matches!! Kazuo is given a mission to manage their company's fighter: a young man who is violence embodied named Tokita Ohma. What will grow between them across the age gap? Friendship? Submission? Or something else...?? It's a passionate drama where a 56-year-old can still grow... The fierce fights between hardened gladiators is about to begin!!

Losing will spell bankruptcy! And the opponent is one of the biggest corporations in Japan! These are the hopeless stakes that the businessman Yamashita Kazuo faces. He has no one to turn to but the mysterious fighter Tokita Ohma, heir of the Niko Style. His opponent is a fighter hired by Penasonic, the biggest electronics manufacturer in Japan: Inaba Ryo, an assassin also known as "The Black Phantom." These fighters who claim to be the strongest clash with their pride on the line, to decide the strongest business and fighter in Japan!!