Chapter Summaries

After the S-Class Heroes planned a team-building assault on the Monster Association, Sitch informed the Hero Association executives that Josen had uncovered a powerful Monster organization beneath Z City's Abandoned Zone. The executives were stunned by the report of numerous elite Monsters and more than ten Dragon-level executives.

• Saitama agreed to let Genos join the Monster Association attack, and Genos recorded Saitama's advice about fighting Monsters as a team.
• Josen proposed making the assault the first S-Class team-building activity, and the Heroes present raised no objections.
• The next morning, Josen called Sitch at Hero Association Headquarters and gave him intelligence about the Monster Association beneath Z City's Abandoned Zone.
• Sitch told the senior executives that the organization had dozens of elite Monsters above Demon-level and at least ten Dragon-level executives, shocking everyone present.

After learning that the Monster Association had gathered more than ten Dragon-level Monsters, the Hero Association mobilized to assemble the S-Class Heroes for a counterattack. Sweet Mask received the alert and agreed to make time to join the operation.

• Sitch told the executives that Super Police would lead a team to attack the Monster Association, calling the mission a team-building activity.
• McCoy urged Sitch to contact Blast, and Sitch promised to try to reach the top-ranked Hero before declaring the crisis a war.
• Josen's call set the Hero Association in motion, and staff across the cities began searching for the hard-to-reach S-Class Heroes.
• In J City, Sweet Mask received an urgent call from Hero Association Headquarters about the Monster Association and agreed to come over.

The Hero Association contacted several S-Class Heroes about the Monster Association gathering underground in Z City. Pig God agreed to go after finishing his meal, while Sweet Mask criticized the other S-Class Heroes and a messenger approached a cell in Smelly Lid Prison.

• Sweet Mask learned of the Hero Association's decisions and said he trusted none of the S-Class Heroes except the great man.
• Watchdog Man refused to leave Q City when Association staff told him the emergency was in Z City.
• Pig God learned about the Monster Association and agreed to head to Z City before dark, after finishing his meal.
• A frightened inmate delivered the Association's message to a cell in Smelly Lid Prison, and the cell door opened after a crash.

Puri-Puri Prisoner left Smelly Lid Prison to answer Josen Boy’s summons, then Bang and Genos searched the mountains and reunited with Bang’s elder brother, Bomb. Bang introduced Genos to Bomb as his old friend’s disciple.

• An inmate told Puri-Puri Prisoner that Josen Boy was calling everyone together, and Puri-Puri Prisoner broke through the prison wall to leave.
• Bang and Genos searched the mountains for Bomb, guided only by the location described in Bomb’s letter.
• Bomb heard Bang approaching and used Whirlwind Cutting Iron Fist to cut away the stones beneath his meditation perch.
• Bang sensed Bomb’s presence, and the brothers reunited after more than a year apart.
• Bang introduced Genos to Bomb, and Genos politely greeted him.

Bang convinced his brother Bomb to accept enhancement through Psychic Powers after defeating him in a sparring match. They returned with Genos as the Hero Association assembled an elite force for the campaign against the Monster Association.

• Bang introduced Genos to Bomb and explained how Psychic Powers had strengthened him.
• Bang defeated Bomb repeatedly, and Bomb agreed to try the enhancement so he could help fight the Monster Association.
• Genos transformed into a fighter jet and flew Bang and Bomb back from the valley.
• The Hero Association assembled professional Heroes, selecting A-, B-, and C-Class Heroes to support the S-Class campaign against the Monster Association.
• Atomic Samurai shouted about unleashing a hundred million cuts and slashes.

Sekingar rallied the Heroes for the operation against the Monster Association, while reinforcements gathered in Z City’s Abandoned Zone. The assembled Heroes awaited orders, and Superalloy Darkshine’s reunion with Puri-Puri Prisoner ended in an awkward public scene.

• Sekingar instructed the Heroes to support the S-Class fighters and led them toward the battlefield.
• Sonic Man guided Mighty Adam and the House of Evolution’s Psychic Powers Corps through the Abandoned Zone to the S-Class Training Program’s base.
• The arriving Heroes and training program graduates assembled in the Abandoned Zone, joined by several S-Class Heroes.
• Puri-Puri Prisoner charged toward Superalloy Darkshine and embraced his hands, leaving Darkshine flustered as nearby Heroes watched.
• Captain Mizuki felt disillusioned after seeing Puri-Puri Prisoner’s enthusiasm for Darkshine, while Forte suspected he had overheard gossip.

Bomb discovered that his strength had surged after breaking through a barrier, while Flashy Flash searched the Abandoned Zone for the Monster Association expedition’s assembly point. After trading insults with Saitama, Flashy Flash followed him, hoping he would lead the way.

• Bomb realized that his mind, technique, and body had grown enormously stronger, and looked forward to disciplining his younger brother again.
• Flashy Flash lost his way in the Abandoned Zone and asked Saitama where the expedition’s assembly point was.
• Saitama stumbled after Flashy Flash called him bald, then pointed him toward the assembly point while the two exchanged more insults.
• Saitama ran off, and Flashy Flash realized he had forgotten which direction Saitama had pointed.
• Flashy Flash caught up with Saitama and jogged beside him, deciding to follow the local Hero to the assembly point.

Saitama traded insults with Flashy Flash as they headed toward the assembly, while Mechanical Psychic Powers impressed the heroes with his improved abilities. Sweet Mask arrived at the gathering, and Sekingar realized the force’s strength could require major revisions to the Monster Association operation plan.

• Saitama accused Flashy Flash of getting lost, and Flash retorted by mocking Saitama’s baldness.
• Mechanical Psychic Powers raised a psychic barrier to shield the assembled heroes from the helicopter’s wind.
• Food Butler asked Mechanical Psychic Powers when he had become so strong, and Mechanical Psychic Powers modestly credited his progress to his training.
• Sekingar recognized that the trainees’ strength exceeded what the intelligence reports recorded and concluded the operation plan needed substantial revision.
• Sweet Mask arrived by helicopter, drawing recognition from the assembled heroes.

Sweet Mask arrived at Josen’s S-Class Training Program and offered to help supervise the other Heroes, while an explosion in the Abandoned Zone drew Josen away. The chapter then revealed that Fubuki’s group had been traveling through the deserted zone toward a Hero Association meeting point.

• Sweet Mask met Josen, praised the training complex, and declined to join the strategy meeting.
• Sweet Mask said he would watch for S-Class Heroes unfit for their positions, then went to wait by his vehicle.
• An explosion and emerald-green energy appeared over the Abandoned Zone, and Josen recognized Tatsumaki’s psychic powers.
• Josen learned that Tatsumaki had erupted over her sister and vanished to handle the situation.
• Ten minutes earlier, Eyelashes questioned Fubuki’s choice of meeting point, while Mountain Ape insisted her invitation from Hero Association Headquarters could not be mistaken.

Fubuki led her group to the address where she sensed Tatsumaki’s Psychic Powers, but Tatsumaki ordered them to leave and mocked their weakness. Fubuki stood up to her sister and defended the group as her precious companions.

• Three-Section Staff Lily rebuked Eyelashes and Mountain Ape for arguing and declared she would follow Fubuki anywhere.
• Fubuki led the group toward the address and sensed her sister’s Psychic Powers nearby.
• Tatsumaki descended from the sky and told Fubuki to go home because the place was no place for her.
• Tatsumaki disparaged the Fubuki Group as weak, and its members had no answer to her criticism.
• Fubuki shouted at Tatsumaki and insisted that the group had worked hard and were her precious companions.

Fubuki stood up to Tatsumaki to defend the Fubuki Group, but Tatsumaki seized her and prepared to take her somewhere safe. After Tatsumaki’s psychic outburst caused a massive explosion, Lanny recognized the green psychic power and halted the Hero Association’s response.

• Fubuki told Tatsumaki that she had never looked down on the Fubuki Group, and the members cheered and cried in support of her.
• Tatsumaki lifted Fubuki into the air with psychic power and said she would keep her somewhere safe until the incident was over.
• The Fubuki Group pleaded with Tatsumaki to return Fubuki to them and promised to protect her.
• Tatsumaki shouted at the Fubuki Group, unleashing psychic power that shattered nearby buildings and caused a pipeline to explode.
• The Z City Hero Association command center mobilized in response to the blast, but Lanny recognized Tatsumaki’s green psychic power and suspended the response procedures.

Tatsumaki threatened the Fubuki Group for following Fubuki until Josen intervened and persuaded her to let them prove themselves. As Josen prepared everyone for the coming Monster Association operation, Saitama and Flashy Flash returned together after witnessing the explosion.

• Tatsumaki trapped Fubuki and threatened to incapacitate the Fubuki Group unless they could withstand her power.
• Josen stopped Tatsumaki's attack, calmed her, and reminded her that the Fubuki Group were important participants in the upcoming Monster Association assault.
• Tatsumaki agreed to let the group continue following Fubuki if they could protect her, and Josen ordered them to attend the second S-Class Training Program after the operation.
• Josen told Fubuki she also had to join the training, prompting her to react with embarrassment while still unable to speak.
• Saitama and Flashy Flash arrived after rushing back from their run, and Flashy Flash gained respect for Saitama's physical abilities.

Josen and the assembled S-Class Heroes prepared to confront the Monster Association, while Psykos’s remote surveillance drew Josen’s attention and nearly overwhelmed her with psychic backlash. The chapter revealed how Psykos had built the Monster Association beneath Z City and left her nervously hiding as the heroes gathered nearby.

• Josen reunited with Saitama and Tatsumaki, and the group departed through his spatial portal.
• Eleven S-Class Heroes assembled, while Josen kept his War God Shadow Clone and the House of Evolution’s psychic legion out of the Association’s records.
• Josen spotted Psykos’s remote eye watching from an abandoned high-rise and crushed it with his gaze, causing Psykos a powerful backlash underground.
• Psykos reconsidered whether the Monster Association could survive the heroes’ strength, especially as Josen had grown far beyond her estimates.
• Psykos’s Orochi experiment gave her the confidence to establish the Monster Association, recruit Dragon-level monsters, and enforce a strict ban on causing trouble in Z City.
• Psykos remained on edge beneath Z City, fearing the nearby S-Class Heroes would discover and attack her base.

Psykos reacted to the Heroes’ mobilization by evolving Orochi and merging with her monster puppet to become Gyoro Gyoro. As the S-Class Heroes assembled above Z City, Josen briefed them on the Monster Association’s executives.

• Psykos dismissed Elder Centipede’s death after his genes had been extracted, then grew alarmed as Heroes gathered under Josen’s direction.
• Psykos developed an evolution serum for Orochi, who consumed many monsters and advanced to the brink of what she believed could be a God-Level Disaster.
• Psykos merged with her monster puppet and became the Dragon-level monster Gyoro Gyoro.
• Gyoro Gyoro ordered Phoenix Man to summon all elite monsters to a general meeting called by Orochi.
• Josen briefed the gathered S-Class Heroes on the Monster Association’s executives, including Orochi and Gyoro Gyoro.

Josen briefed the S-Class Heroes on the Monster Association’s Gouketsu and Evil Natural Water, using F-kid’s drawings to explain their origins and abilities. The heroes considered how they would counter Evil Natural Water as Josen prepared to continue the briefing.

• Josen had F-kid draw Gouketsu and explained that the former martial artist had become a Dragon-level executive after consuming monster cells.
• Josen described Gouketsu’s strength and fighting skill, then advised the heroes to gang up on him because his size was not a particular advantage.
• F-kid drew Evil Natural Water, and Josen explained that it was a liquid monster that reacted to killing intent and could absorb other water.
• Josen warned the heroes that Evil Natural Water resisted most physical and mental attacks and could become difficult to eliminate if it reached a natural water source.
• King considered using lightning against Evil Natural Water, while Atomic Samurai thought about cutting it apart so it could not reform.

Josen finished briefing the heroes on the Dragon-level Monster executives and their abilities, while the S-Class Heroes prepared for the coming battles. The strategy meeting ended with Sekingar agreeing to command the support troops and protect the heroes’ rear.

• Bomb and Bang silently agreed they could defeat the hard-to-kill monster by combining their ultimate technique, while Tatsumaki remained unconcerned.
• Josen warned Atomic Samurai that the many Black Sperm could be a dangerous match for him, leaving the swordsman shaken.
• Josen explained that Gums could corrode piercing weapons with its highly acidic stomach, and Atomic Samurai planned to warn Iai and the others.
• Josen described Fuhrer Ugly and offered to handle him, easing Sweet Mask’s concern that his monster identity might be exposed.
• Josen concluded the briefing on Dragon-level and Demon-level monsters, and Sekingar agreed to support the heroes as frontline commander-in-chief.

Josen began the operation to exterminate the Monster Association as the S-Class Heroes assembled and departed. Meanwhile, the Monster Association’s Dragon-level executives gathered underground, with Nyan and Black Sperm among the arrivals.

• Josen announced that the operation had begun and assigned the Heroes to eliminate the Monster Association’s executives, leaving Orochi to himself or Saitama.
• The S-Class Heroes departed, and Sekingar followed them out.
• Nyan arrived at the underground meeting, sensed Orochi’s immense power, and carefully avoided provoking him.
• More Monsters gathered as Gyoro Gyoro’s experiments and Orochi’s feeding practices were described.
• Black Sperm arrived at the gathering as a Dragon-level executive.

Gyoro Gyoro gathered the Monster Association’s executives and explained that the Hero Association had discovered their existence, forcing the war to begin early. As she outlined the monsters’ plan, a powerful tremor shook the underground base and the executives looked toward a distant wall.

• Black Sperm complained about the quality of his protein and threatened to eat the monsters gathered above him.
• Gouketsu, Rover, Gums, Fuhrer Ugly, Phoenix Man, and other executives arrived at the underground gathering.
• Gyoro Gyoro announced that heroes had discovered the Monster Association and that the war had come early.
• Gyoro Gyoro ordered Demon-level Monsters to create chaos in other cities, an executive to spread Orochi’s cells, and the gathered executives to prepare to confront S-Class Heroes.
• A violent tremor shook the underground space, and Black Sperm pointed toward a distant wall.

Tatsumaki's psychic power flooded the Monster Association base, crushing monsters and alerting Psykos that the Heroes had been discovered. Aboveground, Josen began the operation by asking Tatsumaki to pull the monsters out of their underground lair, but the chapter ended before she acted.

• Tatsumaki's green psychic light spread through the Monster Association base and flattened monsters that touched it.
• Nyan recoiled from the light, while Psykos recognized Tatsumaki's power and warned the Dragon-level Monsters that the war had begun.
• The earthquake intensified, and the underground rock layer shook as the Heroes' attack began.
• Ten minutes earlier, Sekingar handed out intelligence on Dragon-level Monsters as the assembled Heroes prepared for battle.
• Saitama asked how the Heroes would reach the underground base, and Josen said they would pull the monsters up instead.
• Josen turned to Tatsumaki, who appeared yawning and sleepy.

Tatsumaki used her psychic powers to locate and extract the Monster Association’s underground base, shaking Z City and destroying Saitama’s apartment in the process. As the Heroes prepared to fight the exposed monsters, Saitama stopped Genos from confronting Tatsumaki and decided to deal with the lost apartment later.

• Tatsumaki sensed evil presences underground and used her psychic powers to find the Monster Association’s targets.
• Tatsumaki lifted the underground base from the earth, causing a powerful earthquake that halted traffic across Z City.
• Lanny saw the enormous stone pillar rise through the clouds and recognized it as Tatsumaki’s work.
• The Heroes watched monsters tumble from the extracted base, while the psychic Heroes noted Tatsumaki’s extraordinary precision.
• Saitama and Genos spotted Saitama’s apartment lodged in the stone pillar, and Genos set out to demand an explanation from Tatsumaki.
• Saitama pulled Genos back and said they would deal with the apartment later.