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MFU (Marvel Fanfic Universe) by CaptainNinnin
Fandoms: Marvel Cinematic Universe, X-Men (Movieverse), Wonder Woman - All Media Types, DCU (Comics), Batman - All Media Types, Superman - All Media Types, Furry (Fandom), Marvel, Japanese Actor RPF
12 Sep 2026
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Summary
An interconnected universe of heroes and villains. Watch as new heroes rise and new adventures begin. It’s all connected in this MCU fanfic. The Marvel Fanfic Universe, where even DC, Harry Potter, Tokusatsu, and others join in on the fun. I DO NOT own any characters that I myself have not come up with. Marvel characters are owned by Disney. DC characters are owned by Warner Bros. Super Sentai and Kamen Rider are owned by Toei Company, Ltd. Harry Potter is owned by J.K. Rowling and Warner Bros. And I do not know any celebrities used in this story.
Series
- Part 1 of Marvel Fanfic Universe Stories
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Marvel Love by CaptainNinnin
Fandoms: Marvel Cinematic Universe, X-Men (Movieverse), Agents of S.H.I.E.L.D. (TV), Captain America (Movies), Iron Man (Movies), Guardians of the Galaxy (Movies), Wonder Woman - All Media Types, DCU (Comics), Batman - All Media Types, Superman - All Media Types, Furry (Fandom), Marvel, Japanese Actor RPF
23 Aug 2026
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Summary
This is set in a version of the MCU. But with the addition of some new characters, concepts, and other franchises. Including all of the MCU movies AND TV shows and a few other things too. I DO NOT own any characters that I myself have not come up with and the rightful owners are Disney, FOX (now owned by Disney), Warner Bros., and others. No copyright infringement is intended. And I do not know any celebrity that I use in this story.
Series
- Part 1 of It's All Connected
- Part 1 of Marvel AU
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Summary
Cobra has thought that he was supposed to have died for years at this point. His wife came back and saved him from Li; he felt like he should have died to save Smokey, and the very first time he thought he should have died. He was sure Sannoh and SWORD would still be the same, if not better, without him. And that feeling has been growing stronger and stronger ever since the threats have been growing larger. And now that Hyuga knows the secret that happened to another version of him in a timeline that is in his head, what can the Lovers of SWORD do for him to show him that he is the reason SWORD is what it is?
We own nothing but the idea and any original characters in this story.
Series
- Part 11 of Fate
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Tokusatsu What If...? by CaptainNinnin
Fandoms: Tokusatsu, Kamen Rider - All Media Types, Power Rangers, Super Sentai Series, ウルトラシリーズ | Ultra Series
09 Apr 2025
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Summary
The multiverse is a large and weird place. A place where Rangers and Riders can live very different lives. Like Fossil Revice or harem Shinkenger...but who watches to make sure these worlds are not in over their heads? Kamen Rider and Super Sentai are owned by Toei Company, Ltd. Power Rangers are owned by Hasbro. I own nothing but the idea and any OC I create in this series.
Series
- Part 15 of Tokusatsu AU
- Part 14 of It's All Connected
- Part 10 of Marvel Fanfic Universe Stories
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Summary
The world of SWORD is growing darker and more dangerous by the day. Threats are growing more threatening and life-threatening. Cobra wants nothing more than to protect his wife Ichika, his boyfriend Murayama, his girlfriend Fuuka, and the children born to his family since he met his wife. One day soon, he might have to do the one thing he never wanted to do: kill a man.
We own nothing but the idea and any original characters in this story.
Series
- Part 10 of Fate
- Language:
- English
- Words:
- 17,856
- Chapters:
- 5/5
- Hits:
- 112
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Kamen Rider Geats AU: Desires and Disasters by CaptainNinnin
Fandoms: 仮面ライダーギーツ | Kamen Rider Geats, Marvel Cinematic Universe, Japanese Actor RPF
05 Mar 2025
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Summary
Have you ever thought about what could happen if someone else was playing this character? Have you ever thought about what would happen if all of the Kamen Rider Geats cast were female? Or what would happen if something happened to mix the MCU and Kamen Rider? Follow Ukiyo Michiko/Kamen Rider Geats, Sakurai Koume/Kamen Rider Tycoon, Kurama Neon/Kamen Rider Na-Go, Azuma Satsuki/Kamen Rider Buffa, and Tsurmuri as they become the first Kamen Riders that find themselves in the MCU. Kamen Rider is owned by Toei Company, Ltd. Any Marvel characters are owned by Disney. I do not know any real person seen in this. The only thing that I own is any OC I use. No copyright infringement intended.
Series
- Part 18 of Tokusatsu AU
- Part 16 of It's All Connected
- Part 12 of Marvel Fanfic Universe Stories
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Rising Tide.0 by CaptainNinnin
Fandoms: Agents of S.H.I.E.L.D. (TV), Marvel Cinematic Universe
28 Feb 2025
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Summary
Daisy was on vacation when the Avengers called her to their facility. What could they want to talk to her about? Could it have something to do with the string scandals around the world? And who is behind them, to begin with? Could all this connect to Daisy somehow? And if it does how will she handle it?
I DO NOT own any characters that I myself have not come up with and the rightful owners are Disney. No copyright infringement intended.
Series
- Part 8 of It's All Connected
- Part 3 of Marvel AU
- Part 5 of Marvel Fanfic Universe Stories
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Zenkaiger AU: Nagurareta Sentai Hakaiger by CaptainNinnin
Fandoms: Super Sentai Series, 機界戦隊ゼンカイジャー | Kikai Sentai Zenkaiger, 騎士竜戦隊リュウソウジャー | Kishiryu Sentai Ryusoulger, Kamen Rider, Kamen Rider Ghost, Mahou Sentai Magiranger
25 Feb 2025
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Summary
Have you ever thought about what could have been? Here is a story about what could have happened before the Kikaitopia Dynasty Tojitendo attacked planets rather than trap them in gears. And the effects on those worlds that had alternate Super Sentai and others. And what will happen to those after the invasion? Super Sentai and Kamen Rider are owned by Toei Company, Ltd. I own nothing but the idea.
PS. I have changed this description because of some story ideas I had after I posted the first chapter.
Series
- Part 10 of Tokusatsu AU
- Part 10 of It's All Connected
- Part 7 of Marvel Fanfic Universe Stories
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Summary
Two worlds. Two Stories of S.W.O.R.D. In one, S.W.O.R.D. is building a sense of peace for the town that the society of Japan and the world doesn't care for. Thanks to Ichika and her love for her man, Hino “Cobra” Junpei. That love has grown a family and a poly relationship the likes that the town has never seen before.
In the other, S.W.O.R.D. is in ruins. A vampire virus has wrecked the world and destroyed everything. Cobra is the leader of a nest that will slowly take over the world before too much longer. And it is all down to Ichika...who shouldn’t be there. And what will happen if these two worlds try and mix?
We own nothing but the idea and any original characters in this story.
Series
- Part 9 of Fate
- Language:
- English
- Words:
- 11,688
- Chapters:
- 4/4
- Hits:
- 75
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Harry Potter and the Poly Relationship by CaptainNinnin
Fandoms: Harry Potter - J. K. Rowling
31 Dec 2024
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Summary
Harry and Cho had one disastrous date in their relationship. And then he went on to marry and have kids with Ginny Weasley...but what if it went differently? What if Cho ran into Ginny after the date? Ginny was left behind because she was underage when Hary, Ron, and Hermione went off on the mission from Dumbledore...but what if she wasn't as young as everyone thought? What if Ginny was a little older and was able to be more part of the group during that time? And what if they both fell for the Boy Who Lived? I do not own anything but the idea.
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Summary
Have you ever thought about what could have been? What if Hiden Aruto was much more than just a comedian? What if he had a secret life that no one saw coming? And what will happen when he exposes this to the world? Kamen Rider is owned by Toei Company, Ltd. I own nothing but the idea.
Series
- Part 12 of It's All Connected
- Part 12 of Tokusatsu AU
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Lupinranger VS Patranger AU: The Mole by CaptainNinnin
Fandoms: 快盗戦隊ルパンレンジャー VS 警察戦隊パトレンジャー | Kaitou Sentai Lupinranger VS Keisatsu Sentai Patoranger, Super Sentai Series, Tokusatsu
15 Nov 2024
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Summary
Have you ever thought about what could have been? Here is a story about what could have been if the Lupinranger had a Patranger mole besides Takao Noël. Super Sentai is owned by Toei Company, Ltd. I own nothing but the idea.
Series
- Part 1 of Tokusatsu AU
- Part 2 of It's All Connected
- Part 2 of Marvel Fanfic Universe Stories
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NSFW Tokusatsu What If...? by CaptainNinnin
Fandoms: Tokusatsu, Kamen Rider - All Media Types, Super Sentai Series, Power Rangers
29 Oct 2024
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Summary
The multiverse is a large and weird place. A place where Rangers and Riders can live very different lives that have a lot more sex in them than they normally do. Like Jasmine getting lost in lust every morning and night or Yodonna becoming Sayo's little pet. And how these worlds might excite a horny Toku nerd. Kamen Rider and Super Sentai are owned by Toei Company, Ltd. Power Rangers are owned by Hasbro. I own nothing but the idea and any OC I create in this series.
Series
- Part 17 of Tokusatsu AU
- Part 15 of It's All Connected
- Part 11 of Marvel Fanfic Universe Stories
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Summary
Cobra became a gang member for several reasons. One was his admiration of Kohaku and Tatsuya. The other was his father. His father was the leader of the Scorpion gang, which was, in many ways, the founding gang of the city. They fought many enemies, and one of their biggest enemies is returning to seek revenge on the kids of the Scorpion gang. What will Cobra do? Will his murder rage finally get the better of him this time?
We own nothing but the idea and any original characters in this story.
Series
- Part 8 of Fate
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Summary
Takada Fuuka was having a girls' night out when she met Hino Ichika. Her life was never the same when she met her. She may have just found the love of her life, but she also had a life of gangs. Both the good and the bad. Will she be able to live this life of a gang wife?
We own nothing but the idea and any original characters in this story.
Series
- Part 7 of Fate
- Language:
- English
- Words:
- 14,842
- Chapters:
- 4/4
- Hits:
- 65
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Summary
Ichika, Cobra, and Murayama were living their best life. They were parents and leaders of SWORD. But now they are about to face their future with uncertainty. Will they be able to live through this? Find the futures that they want? And the memories they want to have with them for all eternity?
We own nothing but the idea and any original characters in this story.
Series
- Part 6 of Fate
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Summary
Kiba found someone with whom he thinks he could be just as happy as his fathers Cobra and Murayama are with Ichika. But how will Junko react to his "accident" when he was younger?
Junko after so long finally found her bad boy with whom she feels like she could live happily ever after with. But now that she has her bad boy...will she be able to keep him?
We own nothing but the idea and any original characters in this story.
Series
- Part 5 of Fate
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Summary
Ichika was able to travel into the past to change the future of Cobra. But what if something was trying to push the world back down the path where Cobra dies to make a future with no gangs in SWORD? And what happens if two new time travelers enter the love story of Cobra, Murayama, and Chika?
We own nothing but the idea and any original characters in this story.
Series
- Part 4 of Fate
- Language:
- English
- Words:
- 16,031
- Chapters:
- 4/4
- Hits:
- 103
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Summary
It has been a year since Ichika came back from the future. What has become of SWORD now that Ichika has saved Cobra? Is it like the world that she was told was the future or are there more dark clouds in the future of this time and space romance neither expected to go on?
We own nothing but the idea and any original characters in this story.
Series
- Part 3 of Fate
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Summary
Ichika had spent two days talking to the ghost of Cobra. She fell in love with him as he told her the stories of the gang wars that created her peaceful future. But a future without him. With her heart in the past can she move toward the future...or to the past and save the man she loves?
We own nothing but the idea and any original characters in this story.
Series
- Part 2 of Fate
- Language:
- English
- Words:
- 7,475
- Chapters:
- 1/1
- Kudos:
- 1
- Hits:
- 94