1 - 20 of 195 Works in Matsuno Choromatsu & Matsuno Karamatsu
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A Karamatsu Winter Special Nobody Asked For (feat. Karamatsu Speak™) by Philomena Poe (TheCoIIector)
Fandoms: おそ松さん | Osomatsu-san (Anime)
09 Dec 2025
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Summary
"Wow, you changed it back already? So fast. Guess that brown phase really wrecked you. It looked super lame anyway.”
"What was that, Osomatsu-niisan? You think I’m lame?"
Karamatsu’s breath caught. He could see it. Could feel it. The subtle quiver in his little brother. Already trembling, needing reassurance.
He rose from his seat. He felt the gravity of the moment. The responsibility of being an older brother.
❄️
Inspired by Osomatsu-san Season 2 Episode 14: "Choromatsu Incident".
Series
- Part 3 of Silent Seasons, Speaking Hearts
- Language:
- English
- Words:
- 1,628
- Chapters:
- 1/1
- Kudos:
- 5
- Hits:
- 65
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The Space Between Two Brothers by Philomena Poe (TheCoIIector)
Fandoms: おそ松さん | Osomatsu-san (Anime)
08 Dec 2025
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Summary
He wasn’t uncomfortable. Not really. Just… aware.
Aware of the space between them, small yet strangely heavy. Aware of the fact that they usually existed side by side without ever really facing each other.
Older brother and younger brother. A simple relationship.
Except when it wasn’t.
🌱
Inspired by Suirikumatsu's interactions.
Series
- Part 2 of Silent Seasons, Speaking Hearts
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Where the Warm Days Hold Us by Philomena Poe (TheCoIIector)
Fandoms: おそ松さん | Osomatsu-san (Anime)
05 Dec 2025
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Summary
Ever since Karamatsu came home from the hospital, a strange tightness rested beneath his ribs. He kept pretending he didn’t notice it. He kept pretending there was nothing to feel guilty about.
(He threw a pan. A whole pan. At his brother’s face.)
He refused to think about it.
(He’s horrible. A horrible, horrible brother.)
Absolutely not.
☀️
Inspired by Osomatsu-san Season 1 Episode 5: "Karamatsu Incident".
Series
- Part 1 of Silent Seasons, Speaking Hearts
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Summary
When had it started? The small, subtle pull that made him notice Karamatsu in the stillness?
Maybe that night Karamatsu dragged him up to “witness the poetic despair of the setting sun”. Maybe it was when he could not sleep and found Karamatsu already on the roof, humming quietly. Maybe out of the chaos of six identical brothers, they found the same part of the sky interesting.
🍂
Inspired by Osomatsu-san Season 3 Episode 5: "Well, Yeah..."
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Summary
未完待续
- Language:
- 中文-普通话 國語
- Words:
- 2,181
- Chapters:
- 1/?
- Kudos:
- 3
- Hits:
- 45
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Shades of Blue: Karamatsu's Soliloquy by silkensin
Fandoms: おそ松さん | Osomatsu-san (Anime)
25 Sep 2025
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Summary
A collection of oneshots centered on Karamatsu Matsuno, the self-proclaimed "shining star" of the sextuplets, whose bravado hides a heart full of loyalty, pain, and unspoken longing.
From heart-wrenching sacrifices to quiet moments of vulnerability, these stories explore Karamatsu's complex relationship with his brothers and his inner turmoil. Expect heavy doses of whump, hurt/ comfort, and graphic depictions of blood and injury, balanced with the unwavering love he holds for his family.
Tags and warnings updated per chapter.
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Summary
Inspired by the Tenchi Universe, this fanfic offers an alternate take on Osomatsu-san. Karamatsu, an 18-year-old who just graduated from high school, finds himself overwhelmed by the pressures of adulthood and uncertain about his future. All he wants is a bit of peace.
But his life takes a wild turn when five bizarre aliens crash into his world… and, for some mysterious reason, they’re all hopelessly in love with him.
What follows is a whirlwind of cosmic chases, comedic rivalries, and unexpected moments of tenderness, as Karamatsu becomes the unlikely center of an interstellar love polygon. Through it all, he must navigate feelings he never expected about others, and about himself.
- Language:
- English
- Words:
- 1,719
- Chapters:
- 1/?
- Kudos:
- 8
- Hits:
- 48
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Summary
Choromatsu needed to get at least the dishes under control.
Series
- Part 5 of a palette full of matsu
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Summary
“Ah, well. At least we know. It's Chorofappyski who is the bad cook.” Todomatsu teased, grinning at his older brother. The third brother's cheeks became bright red at the comment. “Oi! Who are you calling Chorofappyski!!”
A small story about one of the Matsuno brothers.
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Summary
"His first thought when getting into the car was not one of gratitude. A sword ran down his throat as he reluctantly lent himself against the seat of shame without a wheel to propel his prestige. All he could think of how embarrassed he was that he could not be the one to drive over, and how glad he was that he wasn’t."
Choromatsu, stuck for options, relies on his older brother Karamatsu for a ride to Nyaa-chan's concert.
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Choromatsu Festival 2025: Tidbits Collection by MysteryTea
Fandoms: おそ松さん | Osomatsu-san (Anime)
06 Mar 2025
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Summary
Welcome to Choromatsu Festival, a collection of short stories celebrating everyone's favorite short-tempered, frog-faced, green-coded otaku! Please check each chapter's notes for specific tags!
(For Choromatsu Month 2025)
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Summary
– ¡Se trata de estrechar nuestros lazos fraternales! – La mirada de Karamatsu brilló y abrazó a Choromatsu por los hombros. – ¡Será algo que solo tú y yo compartiremos!
– Ugh, eso suena vergonzoso. – Choromatsu arrugó la cara disgustado – Ni hablar, deja eso donde lo encontraste.
– ¡No! ¿Por favor? – hizo un puchero y lloró falsamente.
– No
– ¡Vamos! Será divertido, ¡compartiremos algo único!
– ¡Eso lo hace sonar mucho más espeluznante! ¡No quiero!
Karamatsu entonces se encorvó y tembló ocultando su rostro.
– No, lo siento, no llores, oye.
– ¡Entonces te obligaré a usarlo!
o
Choromatsu y Karamatsu pasan tiempo de calidad, ambos son idiotas.
Series
- Part 3 of Pequeños intentos
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Summary
Todomatsu doesn't remember his oldest brother very clearly. He hasn't seen him in years, and the memories fade more and more with each day, blurred and greyed at the edges with time. But there's one thing that he knows he'll never forget: the day he left.
Choromatsu just wants his big brother to let him help.
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Summary
okay so, ....UMM?? KaraxChoro fluff okie bye!!
- Language:
- English
- Words:
- 2,602
- Chapters:
- 1/1
- Kudos:
- 6
- Hits:
- 64
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Summary
Karamatsu loved his brothers, he really did, but he wondered if his brothers felt the same. Ignored, treated badly, only seen when someone wants something from him. After a particularly bad day, he decides he will realize his families wishes in a last act, as the show will close the curtains for "the life of Karamatsu".
But of course, he couldn't leave his brothers with nothing, so, before he goes, he treats everyone with presents [chibita will be a bonus character added here], which leave the brothers suspicious of why the sudden attitude without it being a special day, since the blue Matsuno normally doesn't use all his money to treat them and so they (specially Osomatsu) decide to keep an eye on Karamatsu for the week.
as of this day [19/08] I don't know much about what I'll write, so it's a surprise for me too.- Language:
- English
- Words:
- 136
- Chapters:
- 1/?
- Kudos:
- 3
- Hits:
- 115
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Summary
Choromatsu finally has everything he ever thought he wanted in his life--a great job, his own apartment, and sense of independence and purpose. So why does he still feel so unsettled about what he left behind, specifically his five hellish brothers whom he thought he'd be so grateful to be rid of?
Through a series of letters to each of his brothers, Choromatsu manages to find a way to let go of his past, focus on the present, and look forward to the future...and along the way, admits to himself just how much each of his brothers means to him, in their own unique ways.
(For Choromatsu Month 2024)
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\ÒuÓ/ I DECIDED TO MAKE A LOVELY [My very first] A/B/O fanfic about these lovely neets, DO ENJOY!~
(this will be a slow project and i will work on it when i have time but it might take time, Sorry if it's slow! ^^;)
(You can never have enough KaraChoro, I'll probably make this just some drabble!)~It was a nice late summer day, nothing in particular was odd so far, everyone was doing their own business.~
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In the bedroom, the three of them sat, quietly doing their own thing.
"You know," Todomatsu said out of nowhere. "I don't think we ever confirmed which of us is the best fighter now that we're adults."
"Isn't it Osomatsu?" Choromatsu said, turning away from his book about job interview tips to face the youngest. He's, of course, met with the aforementioned youngest still scrolling mindlessly on his phone. Seriously, did he ever put that thing down?
Todomatsu let out a non-committall hum as he thought out a reply. "Back then. We're not sure if he still is."
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Some say most suicidal people have an amazing day one day they decide to go. Many tend to talk of the tell-tale signs of a suicide attempt; depressive days followed by happy. Karamatsu liked to think he didn’t fall into that mold—that he wasn’t suicidal, he was just ready to go.
Yet … today was great.
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after a suicide attempt, the matsuno brothers are left trying to pick the pieces up.
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Summary
Choromatsu could tell something had been on Karamatsu's mind for a while, but he didn't have an answer until Karamatsu pulled him aside for a talk one evening.