History Fanfic / OnePunchManHerosHarem

* MassOhCrap: Deep Sea Queen, Tank Top Girl, and Jet Nice Girl all react to Tatsumaki showing up with fear, especially since Tatsumaki is ''not'' known for negotiating with anyone, least of all monsters.

** The same can be said for Nori, who, under her meek disposition, has a sadistic streak a mile wide that she gives Do-S a front-row seat to when the BDSM-themed monster decides to attack Midori, using her seaweed hair to deliver a NoHoldsBarredBeatdown on Do-S before tying her up and nearly force-feeding her with enough seaweed to make her explode before Midori, Ki, and Kogane calm her down enough to let Do-S go.
** Zenko may be a sweet (if somewhat bratty) little girl, but she can be just as menacing as her brother Metal Bat when she wants to, as demonstrated when she shuts up the customers at the café Saitama and Nori are at for their date when they begin making creepy and perverted comments about Nori's looks.

** Lady Boros, in contrast to her canon counterpart, is not the one to initiate the attack on City A - instead, a trigger-happy gunner on her spaceship starts the attack by bombarding the city with artillery fire in a misguided attempt to curry favor with her despite Boros never giving an order to do so.

* FanDisservice: Sonic views Puri-Puri Prisoner's Angel Style with abject disgust when the Class-S hero unleashes it against Deep Sea Queen. Given how PPP's essentially a nude and grotesquely muscular man in this state, his reaction is quite understandable.

* AdaptationDeviation: Black Sperm is actually a female monster named Little Splitter in this continuity, with her 'Black Sperm' form being a disguise for her to use.

* WhatTheHellHero: Saitama and his companions lay into Genos for being a massive asshole towards the monsters living with them after he attempts to kill Kogane for telling Nyan where Saitama lives even though she did it to protect her sisters.

** [[spoiler: [[ManBehindTheMan Psykos]]]] has began to take notice of Saitama's actions in chapter 43 after seeing Nyan break down whimpering with TearsOfFear coming from her eyes.

* TheirFirstTime: [[spoiler: Saitama and Vaccine Woman touch third base for the first time in chapter 45.]]

* UnderestimatingBadassery: As per canon, Saitama is on the receiving end of this due to his unassuming appearance. Like us audiences, the ones who already know his strength always have a field day watching everyone else react to his absurdity.

* TheDreaded: Saitama quickly becomes this to whoever monsters who see his strength. It's bad enough (for said monsters) that they tend to abandon their hatred for humanity in flavor of survival.

* CluelessChickMagnet: Saitama practically has no clue that all the ladies he has interacted with have feelings for him even though the evidence is right in front of him.
* TheDreaded: Saitama quickly becomes this to whoever monsters who see his strength. It's bad enough (for said monsters) that they tend to abandon their hatred for humanity in favour for survival.

* NaughtyTentacles: Considering the Kombu sisters like to molest girls with their hair, said hairs are this.

* BountyHunter: Beast Queen takes up as a crimefighter for hire in chapter 25 to satiate her BloodKnight tendencies.
* BoxingLessonsForSuperman: [[spoiler: Some of the tamed monsters asked for training from {{old master}}s. So far Midori asked to be Bang's student in chapter 18, while Subterranean Queen and Beast Queen became Nichirin and Bomb's students respectively in chapter 29.]]

* BalloonBelly: Vaccine Girl's belly swells to comical proportions after she eats a monster made of pollutants, gaining herself the EmbarrassingNickname of "Roly Poly Vore Girl" from the Heroes Association in the process. Luckily, all the pollution she eats grants her a GrowthSpurt that restores her to her previous adult-scaled proportions.

** Tatsumaki also sees herself have a more prominent chest and butt and gets a GrowthSpurt after eating some of Ki's seaweed.
* BountyHunter: Beast Queen takes up as a crimefighter for hire in chapter 25.

* GenderFlip:

** [[spoiler: [[ManBehindTheMan Psykos]]]] has began to take notice of Saitama's actions in chapter 43.

* VillainTakesAnInterest: Fubuki and her Blizzard Group, Tank Top Master and his Tank Top Army, Death Gatling and his group of heroes, and the Monster Association converge upon City Z to see what Saitama's really like in chapter 25 thanks to all the crazy events that have happened there.

* AdaptationalHeroism: Many of the monster girls in Saitama's harem turn over a new leaf or at least abstain from causing chaos thanks to his PositiveFriendInfluence.

** Maiko Plasma is a bit friendlier with others after meeting and befriending Midori and Lin Lin.
** Lady Boros, in contrast to her male canon counterpart, is not the one to initiate the attack on City A - instead, a trigger-happy gunner on her spaceship starts the attack by bombarding the city with artillery fire in a misguided attempt to curry favor with her despite Boros never giving an order to do so.
* AlwaysSomeoneBetter: All of Saitama's monster companions know how ridiculously overpowered he is and make sure to stay on his good side lest they die via OneHitKill, and they always make sure to remind everyone, monster or hero, that Saitama is beyond their pay grade.

* BackFromTheDead: A corpse disposal worker accidentally spills his drink on Deep Sea Queen's corpse, allowing her HealingFactor to kick in and revive her.
* BaitAndSwitch: Chapter 24 sees everyone think that Vaccine Woman went and attacked human again ... until she reveals that she broke into the Melon Pop drink factory to drain it of the cocaine the company had been slipping into its drinks, inadvertently helping Child Emperor blow the whistle on its shady dealings when the young hero ran into her while she was absorbing the cocaine.
* BalloonBelly: Vaccine Girl's belly swells to comical proportions after she eats a monster made of pollutants, gaining herself the EmbarrassingNickname of "Roly Poly Vore Girl" from the Heroes Association in the process. Luckily, she doesn't have to worry about that after she receives a growth spurt from all the pollution she eats.

** Zenko may be a sweet (if somewhat bratty) little girl, but she can be just as menacing as her brother Metal Bat, as demonstrated when she shuts up the customers at the café Saitama and Nori are at for their date when they begin making creepy and perverted comments about Nori's looks.
* BigEater: Boros is seen tearing through all the food the Monster Association gave her at their headquarters when Gyoro Gyoro checks up on her, which is due to her HealingFactor requiring massive amounts of energy to repair the grievous injuries she received during her fight with Saitama.
* BreakTheHaughty: As Beast Queen puts it, Saitama helped the monsters under his care realize that they're not so invincible as they thought they were, or so she claims.
* BreastExpansion: Several women in the story grow noticeably larger breasts and butts after eating Kombu Infinity's (a.k.a. Ki's) seaweed. Mizuki and Beast Queen don't notice due to eating small amounts regularly over time but Do-S, who was force-fed a considerable amount, complains about having grown two cup sizes.

** Tatsumaki also sees herself have a more prominent chest and butt and gets a growth spurt after eating some of Ki's seaweed.

* ScrewThisImOuttaHere: Eyesight and Super Mouse decide that it would be best to go AWOL from the Monster Association with their comrades at the first chance they get after Gyoro Gyoro threatens to execute them for their failure to capture Saitama.

** Boros and Geryuganshoop survive and join the Monster Association, though it's mostly to avoid detection by the Hero Association.

** Do-S attempts to brainwash Saitama after her defeat at the hands of Vaccine Woman, Nori, Deep Sea Queen, and Subterranean Queen. Saitama simply No-Sells her attack, breaks her whip into tiny pieces, and scares her into surrendering without even raising his voice.

* MassOhCrap: Deep Sea Queen, Tank Top Girl, and Jet Nice Girl all react to Tatsumaki showing up with fear, especially since Tatsumaki is ''not'' known for negotiating with anyone.

* AdaptationNameChange: Kombu Infinity is renamed Ki since the others decide it would be easier to refer to her by that shortened mnoiker instead of using her full name all the time.

** Maiko Plasma is a bit friendlier with others after meeting Midori and Lin Lin.

* AlwaysSomeoneBetter: All of Saitama's monster companions know how ridiculously overpowered he is and make sure to stay on his good side lest they die via OneHitKill.
* AssholeVictim: The gang of punks that Midori and Lin Lin take down are sent off to Puri-Puri Prisoner for whatever he does to them, but considering how they were going to rape them both, it's hard to feel bad for them.

* IntimidationDemonstration: Saitama proves to Tank Top Girl and Jet Nice Girl ''why'' he's not to be messed with by acing the retraux Heroes Association physical test they put him through and scaring the hell out of Tank Top Girl with his Death Punch

** Great Food Tub suffers from an [[HorrorHunger irresistible compulsion to eat other monsters]], which leaves her a sad and lonely monster who just can't stop herself from consuming others when she's not [[BalloonBelly stuffed with insane amounts of food.]]

** Deep Sea Queen survives getting punched by Saitama after a corpse disposal worker spills his drink on her corpse and kickstarted her regeneration and lives on the run for a while before meeting him again
** Boros and Geryuganshoop survive and join the Monster Association, though they do so only so they can lay low for the time being.

* GagBoobs: Subterranean Queen's bosom is quite... noticeable, to say the least. The same can be said for Nori.
* GenderFlip: Vaccine Man and Beast King are among the monsters that get genderbent in this story.

** Boros isn't the one who starts the attack on City A, with a trigger-happy subordinate of hers being the one who does the deed.

* BewareTheNiceOnes: Kogane may be one of the nicer monsters living with Saitama, but threaten her sisters and she'll make you ''remember'' why that's a bad idea, as Face Ripper can testify.
** The same can be said for Nori, who, under her meek disposition, has a sadistic streak a mile wide that she gives Do-S a front-row seat to when she threatens her sisters.
** Zenko may be a sweet (if somewhat bratty) little girl, but she can be just as menacing as her brother Metal Bat when she wants to.

* BountyHunter: Beast Queen takes up a job hunting down criminals for cash in chapter 25.

* EveryoneHasStandards: Deep Sea Queen's none too happy about how Puri-Puri Prisoner basically assaults men he finds attractive.

* FanDisservice: How Sonic views Puri-Puri Prisoner's Angel Style:

* HaremGenre: [[ExactlyWhatItSaysOnTheTin As if the title wasn't enough of an indication]]. Current list as follows: Vaccine Woman, Subterranean Queen, Beast Queen, Mosquito Girl, Ki, Deep Sea Queen, Tatsumaki, Fubuki, Captain Mizuki, Lin Lin, Tank-Top Girl, Jet Nice Girl, Newtina, Zombiewoman
* HeadTurningBeauty: Nori proves herself one during her and Saitama's date in chapter 38, to the point that EvenTheGirlsWantHer

* NamedByTheAdaptation: The unnamed female monster in chapter 97 of ''One-Punch Man'' is named Newtina, though it turns out to be an alias for her real name Raptora

* AdaptationalAttractiveness: Most of the genderbent monsters are {{Cute Monster Girl}}s instead of, y'know, straight-up monsters.

* AdaptationNameChange: Kombu Infinity is renamed Ki since the others decide it would be easier to refer to her by that instead of using her full name all the time
** Mosquito Girl renames herself Marissa after she decides to live with Saitama
* AdaptationalNiceGuy: Maiko Plasma is somewhat friendlier after meeting Midori and Lin Lin
** Boros isn't the one who starts the attack on City A, with an ex-comrade of hers in the Dark Matter Thieves being the one who does the deed
* AlwaysSomeoneBetter: All of Saitama's monster companions know how ridiculously overpowered he is and stay on his good side lest they die via OneHitKill
* AssholeVictim: The gang of punks that Midori and Lin Lin take down are essentially sent off to Puri-Puri Prisoner for whatever he does to them, but considering how they were going to rape them both, it's hard to feel bad for them
* BaitAndSwitch: Chapter 24 sees everyone think that Vaccine Woman went and attacked human again... until she reveals that she broke into the Melon Pop drink factory to drain it of the cocaine the company had been slipping into its drinks and inadvertently helping Child Emperor blow the whistle on its shady dealings
* BalloonBelly: Vaccine Girl gets one after she eats a monster made of pollutants, gaining herself the EmbarrassingNickname of "Roly Poly Vore Girl" from the Heroes Association in the process. Luckily, she doesn't have to worry about that anymore after her growth spurt.
* BewareTheNiceOnes: Kogane may be one of the nicer monsters living with Saitama, but threaten her sisters and she'll make you ''remember'' why that's a bad idea, as Face Ripper can testify
** The same can be said for Nori, who, under her meek disposition, has a sadistic streak a mile wide that she gives Do-S a front-row seat to when she threatens her sisters
** Zenko may be a sweet (if somewhat bratty) little girl, but she can be just as menacing as her brother Metal Bat when she wants to
* BreakTheHaughty: As Beast Queen puts it, Saitama helped the monsters under his care realize that they're not so invincible as they thought they were, or so she claims

** Vaccine Woman and Deep Sea Queen both grow larger breasts in their {{super mode}}s, with the former permanently becoming bustier as she absorbs pollution
** Tatsumaki also sees herself have a more prominent chest and butt and gets a growth spurt after eating some of Ki's seaweed
* BountyHunter: Beast Queen takes up a job as one in chapter 25

* EveryoneHasStandards: Deep Sea Queen's none too happy about Puri-Puri Prisoner's track record when it comes to his sexuality
--> '''Deep Sea Queen''': Wow. Even in my kingdom, that's a punishable offense
* FanDisservice: How Sonic views Puri-Puri Prisoner's Angel Style

* GagBoobs: Subterranean Queen's bosom is quite... noticeable, to say the least. The same can be said for Nori

** Zombieman is genderbent into Zombiewoman, same for Boros and Geryuganshoop
** Interestingly, Deep Sea Queen [[SubvertedTrope subverts]] this by being the Deep Sea King's sister rather than a genderbent.

* LaserGuidedKarma: Do-S is whipped in the butt by Ki for brainwashing Captain Mizuku after the latter breaks her out of the former's mind control

* OhCrap: Bang is understandably terrified when Saitama moves to smack him on the head after he finally wins a round of rock-paper-scissors with him considering that he could have killed him with the sheer strength he has
* PragmaticVillainy: Deep Sea Queen killed her brother and took over the throne of the Sea Folk after he announced his plans to eradicate humanity since that would have deprived them of a perfectly usable workforce after they took over the surface
* ScrewThisImOuttaHere: Eyesight and Super Mouse decide that it would be best to go AWOL from the Monster Association with their comrades at the first chance they get after Gyoro Gyoro makes his disappointment towards them clear

** Boros and Geryuganshoop survive and join the Monster Association(mostly for survival, though)
* TranquilFury: It's hard to piss off Saitama, but when he's pushed past his limit, he'll make sure you understand just ''how'' angry he is without even raising his voice or changing his facial expression
* VillainTakesAnInterest: Fubuki and her Blizzard Group, Tank Top Master and his Tank Top Army, Death Gatling and his group of heroes, and the Monster Association all decide to move to City Z to see what Saitama's really like in chapter 25 thanks to all the crazy events that have happened there

* DecompositeCharacter: Ki splits into Ki, [[ShrinkingViolet Nori]], [[ShesGotLegs Kogane]], and [[LoveableSexManiac Midori]] after she chugs a bunch of plant fertilizer from different brands on Vaccine Woman's advice to regrow her hair