1 - 20 of 59 Works in ESP Kitty (Osomatsu)
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let’s feed stray cats together and forever by misou_soupp
Fandoms: おそ松さん | Osomatsu-san (Anime)
29 Oct 2025
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Before she fell in love with Ichimatsu , she first smiled at Atsushi.
- Language:
- English
- Words:
- 3,855
- Chapters:
- 1/1
- Kudos:
- 1
- Hits:
- 8
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From NEETS to Heroes by Suffocation
Fandoms: おそ松さん | Osomatsu-san (Anime), 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
22 Sep 2025
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The Sextuplets are the sons of a past pro-hero, Matsuzo Matsuno.
Osomatsu never wanted to become a hero, not like someone with a quirk like his could ever become one, he thought. He always told people that he was too good for hero's duty and would rather do something else.
Was he jealous of his younger brother's quirk? Maybe. He always thought his quirk was just not suitable for being a hero, so he avoided unbeknownst failure, dragging his brothers down with him.
But what happens if he were offered the choice to be one? To actually be someone with responsibility?
- Language:
- English
- Words:
- 3,253
- Chapters:
- 1/?
- Kudos:
- 4
- Hits:
- 34
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I Got Reincarnated Into an Isekai, and Now I’m Stuck in a Harem With Six Matsunos by Izely
Fandoms: おそ松さん | Osomatsu-san (Anime)
07 Jul 2025
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A otaku girl wakes up to find that she has reincarnated into her favorite anime: Osomatsu-san. Surrounded by the six Matsuno brothers, she feels a mix of excitement, curiosity… and a growing fear as she realizes she might never be able to return to her previous life. Can she adapt to this new reality?
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You are so beautiful, the most beautiful angel in the world. Life was good until you were shot down from heaven and fell on to a house with a bunch of identical men. Now they're trying to help you get back to heaven, while also protecting you from danger. (WARNING: THIS STORY IS VERY SAD AND HAS LOTS OF LEMON SEX)
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None of them thought there was a problem. They treated him the same as usual. Whatever was wrong with Karamatsu wasn't known to his family, especially since he was so good at hiding it. Until Osomatsu found out.
Basically a story of Karamatsu trying to live with depression.
[DISCONTINUED]
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Karamatsu didn't hate cats, but one day he found himself being terribly scared of them.
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Uma história de amor proibido que começou em um aniversário coletivo.
Não é nem um pouco engraçado. -
Iyami, Alone In the Wind: The Musical by RawEmotionalSewage
Fandoms: おそ松さん | Osomatsu-san (Anime)
05 Oct 2021
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Iyami is Jean Valjean in Les Miserables.
All lyrics and recordings are by me
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You buy an impulsive one way ticket to Japan amidst a breakdown without any prior knowledge to the culture or it’s people. On your first day in the country, you meet a man named Matsuno Ichimatsu.
Updated every Sunday.
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On a lazy Sunday in the winter month of February, Jyushimatsu gets infected by a stomach bug. Luckily, his band of brothers are there to take care of their little ray of sunshine...
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You spend Christmas at your boyfriends parent’s house with his family. But could one of them be stuck in the past?
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After a night out goes terrible, Osomatsu wakes up in a strange world. Where is he and can he leave?
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It genuinely bothers Choromatsu when everyone else seems to interact with Ichimatsu just fine, but it's physically and mentally taxing whenever he attempts to do the same.
This is a kind of sort of sequel to Swimmy, in which Choromatsu and Ichimatsu go on a gradual journey of developing an actual relationship with each other by finding at least one thing they have in common.
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Who is Ichimastu? by GukMate
Fandoms: おそ松さん | Osomatsu-san (Anime), おそ松くん| Osomatsu-kun (Anime 1966), おそ松くん| Osomatsu-kun (Anime 1988)
02 Nov 2019
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As an assignment, [Y/N] was forced to keep an eye on a man who was claimed to be a danger to society. Unbiased to her, she didn't know the job would be on a man that's very peculiar yet alluring.
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Poke the Matsunos by The_Mousetsunos (The_Adventure_Diary)
Fandoms: おそ松さん | Osomatsu-san (Anime)
06 Sep 2019
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What if the Matsuno brothers were Pokemon?
Two parts- One: Discussion (Comment your ideas) The second: Short stories (Both fanon and not)
The story? Official fanon plotline, constructed by the author and you, if you decide to join.This is a for-fun work, discussing and writing short drabbles for a Pokemon/Osomatsu-san crossover.
It’s pretty crazy. -
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Why can't relaxing ever be easy.
Series
- Part 3 of Vent
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Konyanyachiwa by Carl_Eckermann
Fandoms: おそ松さん | Osomatsu-san (Anime), おそ松くん| Osomatsu-kun (Anime 1966)
27 Apr 2019
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ESP Kitty figures out Ichimatsu's real intentions...
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A lonely idiot decides to wander the woods said to be the home of a viscious monster.
(Unfinished fic inspired by the hesokuri princess set)Series
- Part 3 of Unfinished
- Language:
- English
- Words:
- 719
- Chapters:
- 1/1
- Kudos:
- 13
- Hits:
- 177
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A collection of one-shots and ficlets for Malice in Underland, each chapter with a different plot and relationship/pairing. See individual chapters for descriptions.
Chapter 1 (Love in Underland): Homura ends up in purgatory following a suicide attempt. Angel!Jyushimatsu realizes that she doesn't belong in the afterlife. Though it pains him to do so, he helps her to return to the world of the living. (references episode 9 of season 1)
Chapter 2 (Hell in Underland): Osomatsu’s not in hell. Not technically. But each time he opens his eyes to the darkness and remembers where he is, he thinks it may as well be. (why Osomatsu refuses to do his job and insists on going to the pachinko all the time)
Chapter 3 (Cats in Underland): After ESP Kitty died, there isn't much left for him to do but to wait for Ichimatsu on the other side.
Chapter 4-8 (Before Underland): Prequel to Malice in Underland (Ichimatsu's POV). If Ichimatsu had to pinpoint when things started going downhill, it would have to be the day that Choromatsu told everyone he was getting a job. (post ep 24)
Series
- Part 2 of Malice in Underland
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An ill-fated love affair, a profound loss, and a long-shot chance at a happily ever after. At what point is giving up the best option?