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Recap / One-Punch Man - Anime

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Warning! On Recap pages, all spoilers are unmarked! Read at your own risk.

See here for the original webcomic and here for the manga.
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    Season 1 
https://static.tvtropes.org/pmwiki/pub/images/one_punch_man_tv_anime_key_visual.png
  1. The Strongest Man
  2. The Lone Cyborg
  3. The Obsessive Scientist
  4. The Modern Ninja
  5. The Ultimate Master
  6. The Terrifying City
  7. The Ultimate Disciple
  8. The King of the Deep Sea
  9. Unyielding Justice
  10. Unparalleled Peril
  11. Dominator of the Whole Universe
  12. The Strongest Hero

OVAs

  • Road to Hero: The only full-length instead of half-length OVA, this story takes place during Saitama's training when he still had hair. As he fights the monsters in Z-City, he meets a draper who is the last clothes shop in the city due to gang activity. Saitama discovers the entire gang lives in the same complex as him, so he defeats them all to collect the bounties on their heads. He encounters their boss, a monster called Fish of Darkness, and beats him up too. However, the landlady complains that Saitama just got rid of all her tenants and kicks him out. When Saitama returns to the draper, he gives Saitama his final masterpiece as thanks: a superhero suit. In the present, Genos marvels at this story and asks Saitama if he wants a new suit, but Saitama states that it's now an important memento.
  • The Shadow That Snuck Up Too Close: Before Genos moved in with Saitama, he closely stalks him hoping to find the secret of his power. He watches him buy French fries at a restaurant and steals the longest one to examine, much to Saitama's chagrin. Later, Saitama finds himself met with the villain Men's Esthetician Man, who claims to have faced him in the past. Saitama assumes that he's the fry thief and defeats him. Meanwhile, Genos finds inconclusive results after analyzing the fry.
  • The Pupil Who Is An Extremely Poor Talker: A criminal named Don Pacino holds an important hostage and steals a key to Saitama's apartment, attempting to extort information out of Genos. Genos tells Don Pacino and his thugs about how Saitama told him not to lose the keys while at a public bath. After the bath, they split up to hit sales at two different stores at once for dinner. However, Genos was distracted by a monster attack, and by the time he defeated it, the sale had ended. Don Pacino is annoyed by Genos' long story, demanding to know how Genos knows the hostage. After Genos tells another irrelevant story, Pacino realizes that Genos is not related to the hostage after all. The gangsters shoot at him, so he subdues them all and frees the hostage. At home, Genos apologizes to Saitama for losing his key.
  • The Ninja Who Is Too Complicated: Ever since his loss against Saitama, Sonic has had nightmares. He goes to a forest to retrain himself, meeting a bear hunter named Frank. He also saves a baby boar from a snake, whom he names Ino. After Sonic leaves Ino with Frank and heads home, the bear returns to attack Frank. Saitama appears, looking for some food, and kills the bear to eat with Genos. After Frank wakes up, he and Ino look with amazement at the forest cleared by Saitama's punch.
  • Bang, Who Is Too Overbearing: After the giant meteor incident, Bang spies on Saitama and Genos to gauge their abilities. He then invites them to his dojo under the pretense of free meat. At the dojo, Bang challenges Saitama to a variety of games, including card-based memory games and rock-paper-scissors, which Bang wins almost every time. Saitama nearly crushes Bang with a hammer during a particular match, forcing him to recognize his power. Noticing Saitama's passion for the games, Bang still offers to let them join the dojo, but Saitama refuses.
  • The Sisters Who Have Too Many Things Happening: After the Seafolk invasion, the Blizzard Group is disappointed their feats are not recognized in the news. Fubuki takes this the hardest and goes on a train ride to clear her thoughts. Genos happens to be on the same train with groceries. During the ride, Genos receives a call that an ex-hero serial bomber has planted a bomb on the train that will detonate once it reaches the Z-City station. Fubuki evacuates panicked civilians off the runaway train and finds the bomb with the help of a newbie hero, Swim, while Genos tries to stop the train from the outside. Luckily, Tatsumaki appears and successfully detonates the train with no casualties. Fubuki runs into Swim again on the way home, who promises to join the Blizzard Group once she reaches B-Class. Meanwhile, Genos visits Dr. Kuseno to ask for psychic abilities. The short ends with Saitama wondering why Genos is so late.
  • The Murder Case That Is Too Impossible: After the Dark Matter Thieves' attack, all the heroes present were invited to a luxury resort, including Saitama, Genos, and several others. However, that night Zombieman is found murdered. In flashbacks, the heroes are shown enjoying the hot springs and a sake ceremony. Child Emperor discovers that the weapon stabbed through Zombieman is Atomic Samurai's sword. Zombieman wakes up and reveals that Atomic Samurai's sword was floating in green light. After looking at surveillance footage, it's revealed that Tatsumaki was drunk off sake and stabbed Zombieman in her intoxicated stupor. On the way home, Genos believes that Tatsumaki's drunken mischief was thanks to Saitama since he had playfully scolded her for drinking adult sake that night.
    Season 2 
https://static.tvtropes.org/pmwiki/pub/images/one_punch_man_season_2_poster.png
  1. The Return of the Hero
  2. The Human Monster
  3. The Hunt Begins
  4. The Metal Bat
  5. The Martial Arts Tournament
  6. The Monster Uprising
  7. Heroes The S-Class Heroes
  8. Resistance of the Strong
  9. The Strongest Troubles
  10. Justice Under Siege
  11. The Varieties of Pride
  12. The Wiping of the Disciple

OVAs

  • Saitama and the Mediocre Ability Users: A trio of villains meets in a public restroom to plot their first bank heist. Saitama enters, and they believe he is part of the team too, as they expected four members. When he reveals that he is a hero, they attack him with ineffectual supernatural powers. They are embarrassed by their failure but are suddenly endangered by an underground monster called Dirt Earthworm. Saitama saves them but is unable to catch it before it burrows away. Genos arrives, having heard about the monster. The trio lies, saying they wanted to learn from Saitama to be heroes too, so Saitama subjects them to his insane workout routine. Meanwhile, Dirt Earthworm watches from afar, plotting his revenge, but a sparrow plucks him up and eats him.
  • Going Fishing With Middle-Aged Men: Atomic Samurai and Bang are fishing on a lake. Nearby, the monster Giant Salamander has been pursued to the lake by Chain'n'toad and Mumen Rider. Giant Salamander lured them there to fight in the water, where he easily overpowers them both, swallowing Chain'n'Toad and thrashing Mumen Rider. The two are saved by Atomic Samurai quickly killing the monster. Atomic Samurai and Bang talk about how many young heroes these days don't seem like real "heroes", and Bang states the Hero Association's ranking system is partly to blame. He suggests the upcoming Saitama may help to change this but decides to let Atomic Samurai wait and see who he's talking about.
  • Genos and Memory Loss: Saitama pulls too hard opening a bag of chips, and they explode everywhere. In his haste to save them, he accidentally hits Genos in the head. This causes Genos to lose his memory. He begins mimicking a child on the TV, and after reading some of Saitama's manga, adopts the mannerisms of a rude delinquent. The doorbell rings and Genos accidentally blasts Saitama with his incinerators. Fubuki enters the apartment and, realizing the opportunity, calls the Blizzard Group to recruit Genos while he is in this highly suggestible state. Genos' sensors then pick up an energy signature and he leaves. The Blizzard Group tries to recruit Genos while he's out, but he flees. A confused Genos next runs into a monster called the Lord of the Mountains. Some civilians call Genos a hero, so the Lord of the Mountains challenges him. The amnesiac Genos fails to realize he can fight, so he runs to find Fubuki. He fails to fight back until he is hit hard enough to rejuvenate his memory. Genos then makes quick work of the Lord of the Mountains. That evening, Genos apologizes to Saitama with meat made of the Lord of the Mountains.
  • Games and Rivals: Saitama brings Genos to a tournament for the video game "Wild Animals" due to the grand prize being five million yen. Several locations are being used as venues, with the battles taking place online. Saitama plans to use virtual reality controls, but his fighting techniques don't translate well and he loses to a koala avatar in the first round. Garou has also entered the tournament, easily defeating opponents with his martial arts, and Suiryu does the same in another venue. Eventually, Garou and Suiryu fight, but the speed of Garou's attacks causes the equipment to glitch, freezing his avatar and allowing Suiryu to win. The final match is between Suiryu and the same koala from earlier, who beats Suiryu in mere seconds. The koala's player goes to receive their prize, and it's revealed to be King in disguise.
  • Puri-Puri Prisoner and the Jailbreaking Prisoners: One stormy night, a monster emerges from a junkyard near Smelly Lid Prison. Puri-Puri Prisoner breaks out to defeat it, but accidentally damages the prison's electricity in the process, allowing a handful of inmates to escape. Realizing the incident may cost a certain cute employee his job, Puri-Puri Prisoner hunts down the escaped inmates. He finds one in the city and subdues him, drawing the attention of Sonic. The ninja challenges Puri-Puri Prisoner, but he merely flirts with him and leaves. The rest of the inmates, who are hiding in an abandoned house in the countryside, fear Puri-Puri Prisoner's wrath and consider turning themselves in. Before they can, they are met with Urn Eel, a Seafolk survivor who was hiding in the house before them. Puri-Puri Prisoner appears and beats the monster down before turning to the horrified inmates. Despite the odds, Urn Eel stands his ground, so the inmates cheer him on. Puri-Puri Prisoner believes they are cheering for him instead, and after killing Urn Eel he is so touched that he lets them return to prison peacefully.
  • Zombieman Murder Case Two: Child Emperor, Zombieman, Superalloy Darkshine, and Metal Bat are dispatched to a snowy mountain to hunt a monster. They fail to find anything, so they check into a lodge for the night. There they meet Saitama and Genos, who also got stuck on the mountain, and Flashy Flash, who is trying to relax on vacation. Sonic has also been training on the same mountain and decides to kill Saitama. However, he stays outside for too long and freezes, crashing through a window. The heroes tie him up, but Sonic easily escapes to attack Saitama from under the floorboards. He is stopped by Genos, and their encounter destroys the room. The dust irritates Saitama's nose and he sneezes, blowing open every door and window in the lodge. The power goes out, followed by an explosion. The heroes head to the den, finding the room destroyed and Zombieman unconscious. Child Emperor states the culprit must be in the lodge, but the group finds that they all have good alibis (forgetting about Flashy Flash upstairs). They assume the monster is responsible, but after learning it is a bear monster called Bruinado, they scrap the idea. Once Child Emperor sees Saitama sneeze again, he deduces the truth: the heaters in the lodge dried out the interior, Genos and Sonic's fight kicked up flammable dust, Saitama's sneeze pushed the dust into the den, all the electricity usage caused a breaker to trip, and Zombieman's lighter caused the dust to detonate. Suddenly, Bruinado crashes through the front door, but he is quickly defeated by the exasperated warriors. Upstairs, Flashy Flash continues to use all the lodge's power.

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