Second and Fourth Sons

This is a tumblr blog that automatically posts onto the #ichikara and #karaichi tumblr tags whenever the Ichimatsu Matsuno/Karamatsu Matsuno fanfiction tag on Ao3 is updated with a new fic. Here to give you your daily dose of these two!

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We Never Meant To Be Together or Alive

read it on the AO3 at https://ift.tt/ne38TsN

by die and let live (micchix), DonHiralover42, micchix

The world was cruel, a kind of place İchimatsu and Karaatsu couldn't live. Their love was forbidden, they couldn't face to live without each other so they chose death... 4 times

Words: 3023, Chapters: 1/?, Language: English

Fandoms: おそ松さん | Osomatsu-san (Anime)

Rating: Mature

Warnings: Creator Chose Not To Use Archive Warnings, Graphic Depictions Of Violence, Major Character Death

Categories: M/M

Characters: Matsuno Ichimatsu, Matsuno Karamatsu

Relationships: Matsuno Ichimatsu/Matsuno Karamatsu

Additional Tags: Suicide, double suicide, Couple suicide, Suicide by cutting, Blades, Self-Harm, Reincarnation, Alternate Universe - Reincarnation, Twincest, Alternate Universe - Twins, Harassment, Forbidden Love, Sibling Incest, Matsuno Sextuplets Incest | BLMatsu (Osomatsu), suicide forest, Suicide by poisoning, Corpses, Graphic Description of Corpses

read it on the AO3 at https://ift.tt/ne38TsN

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☆☆☆30 Días OTP☆☆☆(one true pairing/un verdadero emparejamiento)

read it on the AO3 at https://ift.tt/UMW1TFf

by Karamatsu_chembotarovaite

Después de rotar uno al rededor del otro por demaciado tiempo, alfin convirtieron lo que tenian entre ellos en un elegante pero intrincado, turbio y secreto título, pasando de ser solo “hermanos idénticos”, a ser “hermanos idénticos ‘novios’”, pero se confiaron demaciado. Se la van a pasar intentando que nadie los descubra mientras las implicancias de ser una "pareja" les golpea en la cara sin advertencia, fallando terriblemente, por supuesto.

Words: 1330, Chapters: 1/30, Language: Español

Fandoms: おそ松さん | Osomatsu-san (Anime)

Rating: General Audiences

Warnings: No Archive Warnings Apply

Categories: M/M

Characters: Matsuno Karamatsu, Matsuno Ichimatsu, Matsuno Jyushimatsu, Homura, Matsuno Choromatsu, Matsuno Todomatsu, Matsuno Osomatsu, Matsuno Matsuyo, Matsuno Matsuzo

Relationships: Matsuno Ichimatsu/Matsuno Karamatsu, Homura/Matsuno Jyushimatsu

Additional Tags: Matsuno Sextuplets Incest | BLMatsu (Osomatsu), Sibling Incest, Established Relationship, Homophobic Language, dulce, No Angst, desde aca pongo las etiquetas en español por que i'm not speak ingles, un poco de conflicto emocional, drama pero sin angustia, sin tanta angustia, Good Sibling Matsuno Osomatsu, Ichimatsu tiene miedo, Switch Matsuno Karamatsu/Matsuno Ichimatsu, quise decir que son versatiles cuando hacen el amor, muy dulce, da caries, karamatsu es cursi, centrado en Karaichi, lo siento

read it on the AO3 at https://ift.tt/UMW1TFf

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Palitos de fósforo

read it on the AO3 at https://ift.tt/0HzvFnL

by AKittyCrystalStarr

Uma história de amor proibido que começou em um aniversário coletivo. Não é nem um pouco engraçado.

Words: 826, Chapters: 1/1, Language: Português brasileiro

Fandoms: おそ松さん | Osomatsu-san (Anime)

Rating: Mature

Warnings: Creator Chose Not To Use Archive Warnings, No Archive Warnings Apply

Categories: M/M

Characters: Matsuno Osomatsu, Matsuno Karamatsu, Matsuno Choromatsu, Matsuno Ichimatsu, Matsuno Jyushimatsu, Matsuno Todomatsu

Relationships: Matsuno Choromatsu/Matsuno Osomatsu, Matsuno Ichimatsu/Matsuno Karamatsu, Matsuno Jyushimatsu/Matsuno Todomatsu

Additional Tags: Matsuno Sextuplets Incest | BLMatsu (Osomatsu), Sibling Incest, Sibling Bonding, Sibling Love, Brother/Brother Incest, Mentioned Totoko, Mentioned Hashimoto Nyaa, Osomatsu is sad, Falling In Love

read it on the AO3 at https://ift.tt/0HzvFnL

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"Rosas"

read it on the AO3 at https://ift.tt/eILfgFH

by Nashira_Trancy

Cada uno era como una rosa, podían parecer inofensivos pero ellos tenían espinas las cuales inyectaban veneno a quien quisiera tocarlos, veneno que con los años fue haciéndose cada vez más letal y que solo ellos eran inmunes al veneno que cada uno de sus hermanos había desarrollado, porque ellos estaban juntos y siempre lo estarían sin importar que tan dura fuera su vida, seguirían de pie demostrando su esplendor. Después de todo las rosas son así, con hermosos pétalos y perfumes pero con dañinas y letales espinas

Words: 1775, Chapters: 2/?, Language: Español

Fandoms: おそ松さん | Osomatsu-san (Anime)

Rating: Not Rated

Warnings: Graphic Depictions Of Violence, Rape/Non-Con

Characters: Matsuno Osomatsu, Matsuno Karamatsu, Matsuno Choromatsu, Matsuno Ichimatsu, Matsuno Jyushimatsu, Matsuno Todomatsu, Matsuno Akumatsu, Matsuno Kamimatsu

Relationships: Matsuno Choromatsu/Matsuno Osomatsu, Matsuno Ichimatsu/Matsuno Karamatsu, Matsuno Jyushimatsu/Matsuno Todomatsu

Additional Tags: AU mafia

read it on the AO3 at https://ift.tt/eILfgFH

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有一天，色松向爸妈出柜

read it on the AO3 at https://ift.tt/HnZTKqm

by asesese

Words: 653, Chapters: 1/1, Language: 中文-普通话 國語

Fandoms: おそ松さん | Osomatsu-san (Anime)

Rating: Not Rated

Warnings: No Archive Warnings Apply

Categories: M/M

Characters: Matsuno Ichimatsu, Matsuno Karamatsu

Relationships: Matsuno Ichimatsu/Matsuno Karamatsu

read it on the AO3 at https://ift.tt/HnZTKqm

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The Animal Within

read it on the AO3 at https://ift.tt/1Kjf0qc

by yumeniz

Everything is not what it seems as something terrible has been going on in the Matsuno household. But what could it be?

Words: 3220, Chapters: 1/?, Language: English

Fandoms: おそ松さん | Osomatsu-san (Anime)

Rating: Explicit

Warnings: Graphic Depictions Of Violence, Rape/Non-Con

Categories: M/M

Characters: Matsuno Sextuplets (Osomatsu), Matsuno Osomatsu, Matsuno Karamatsu, Matsuno Choromatsu, Matsuno Ichimatsu, Matsuno Jyushimatsu, Matsuno Todomatsu, Matsuno Matsuyo, Matsuno Matsuzo

Relationships: Matsuno Ichimatsu/Matsuno Karamatsu, Matsuno Ichimatsu & Matsuno Karamatsu, Matsuno Ichimatsu/Matsuno Osomatsu, Matsuno Ichimatsu & Matsuno Osomatsu, Matsuno Karamatsu & Matsuno Osomatsu, Matsuno Karamatsu/Matsuno Osomatsu

Additional Tags: Omega Matsuno Ichimatsu, Beta Matsuno Osomatsu, Alpha Matsuno Karamatsu, Switching, Crazy, Sex, Rape, Rape/Non-con Elements, Rough Sex, Oral Sex, Anal Sex, Biting, Nipple Play, Nipple Licking, Nipples, Nipple Torture, nipple sucking, dick sucking, Matsuno Sextuplets Incest | BLMatsu (Osomatsu), Incest, Brother/Brother Incest, Sibling Incest, Breeding, ichimatsu in heat, osomatsu is horny, karamatsu is sexually confused, Mysterious, Rage, Animal Instincts, Tearing skin, fangs, Blood, Blood and Injury, Blood and Violence, Blood Kink, Torture, Breathing, Moaning, groaning, Panting, Alpha/Omega, Omegaverse, ABO, Anal Leakage, Drugs, Drug Use, Drugged Sex, Drug Abuse, Drug Addiction, Deception, Pain, Painful Sex, Chronic Pain, Painkillers, Painplay, Angst, Heavy Angst, Drama, Angst and Drama

read it on the AO3 at https://ift.tt/1Kjf0qc

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Once Upon Your Dream

read it on the AO3 at https://ift.tt/jyXiGBO

by DonHiralover42

Once a day Karamatsu dreams about a Prince who is so alike İchimatsu and a land that is so beatiful and magnificent.

But soon he gets addicted to his dreams.

Words: 2880, Chapters: 1/?, Language: English

Fandoms: おそ松さん | Osomatsu-san (Anime)

Rating: Not Rated

Warnings: Creator Chose Not To Use Archive Warnings

Categories: M/M

Characters: Matsuno Ichimatsu, Matsuno Karamatsu, Matsuno Choromatsu, Tatsunami (Osomatsu)

Relationships: Matsuno Ichimatsu/Matsuno Karamatsu

Additional Tags: Alternate Universe - High School, High School, Alternate Universe - Not Related, Angst and Hurt/Comfort, Fluff and Angst, Dreams, Depression, Loneliness, Imaginary Friends, Other Additional Tags to Be Added, Princess Matsuno Karamatsu, Top Matsuno Ichimatsu, Bottom Matsuno Karamatsu

read it on the AO3 at https://ift.tt/jyXiGBO

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After Dark

read it on the AO3 at https://ift.tt/HcMy7wV

by Gloriosum_Novum_Solem

En fin, Ichimatsu sufre por amor mientras Karamatsu es el sol que es.

Words: 480, Chapters: 1/1, Language: Español

Series: Part 1 of Songficmatsu

Fandoms: おそ松さん | Osomatsu-san (Anime)

Rating: Teen And Up Audiences

Warnings: No Archive Warnings Apply

Categories: M/M

Characters: Matsuno Ichimatsu, Matsuno Karamatsu

Relationships: Matsuno Ichimatsu/Matsuno Karamatsu

Additional Tags: Songfic

read it on the AO3 at https://ift.tt/HcMy7wV

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The moon will light the way (to the one you love)

read it on the AO3 at https://ift.tt/XlzvKjF

by Ichimatsus_beloved

Karamatsu and Ichimatsu enjoy some sweet intimate time together.

Words: 2356, Chapters: 1/1, Language: English

Series: Part 3 of my jolly sailor bold

Fandoms: おそ松さん | Osomatsu-san (Anime)

Rating: Not Rated

Warnings: Creator Chose Not To Use Archive Warnings

Categories: M/M

Characters: Matsuno Ichimatsu, Matsuno Karamatsu

Relationships: Matsuno Ichimatsu/Matsuno Karamatsu

Additional Tags: Tooth-Rotting Fluff, Smut, Sweet, Bottom Matsuno Ichimatsu, Top Matsuno Karamatsu

read it on the AO3 at https://ift.tt/XlzvKjF

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Welcome to the Fuck Farm

read it on the AO3 at https://ift.tt/L0GtdXP

by yumeniz

Prepare Yourself!

What happens in the Fuck Farm, stays in the Fuck Farm…

Words: 10620, Chapters: 1/1, Language: English

Fandoms: おそ松さん | Osomatsu-san (Anime)

Rating: Explicit

Warnings: Graphic Depictions Of Violence, Rape/Non-Con

Categories: M/M

Characters: Matsuno Osomatsu, Matsuno Karamatsu, Matsuno Ichimatsu

Relationships: Matsuno Karamatsu & Matsuno Osomatsu, Matsuno Karamatsu/Matsuno Osomatsu, Matsuno Ichimatsu/Matsuno Osomatsu, Matsuno Ichimatsu & Matsuno Osomatsu, Matsuno Ichimatsu/Matsuno Karamatsu, Matsuno Ichimatsu & Matsuno Karamatsu

Additional Tags: farm, Sex, Anal Sex, Oral Sex, chicken wire, Fucking, Breast Fucking, Large Breasts, Breasts, fuck farm, Matsuno Sextuplets Incest | BLMatsu (Osomatsu), Osoichi, IchiOso, karacest, Bottom Matsuno Karamatsu, Top Matsuno Karamatsu, Top Matsuno Osomatsu, Bottom Matsuno Osomatsu, Top Matsuno Ichimatsu, Bottom Matsuno Ichimatsu, spoiled milk, cum, semen - Freeform, Large Cock, testicles, giant balls, Milking, Sweat, Wetting, Wet Dream, Drugs, Pain, Chronic Pain, Painful Sex, Painplay, Nudity, Anal Play, Anal Plug, Double Anal Penetration, Horny, Snorting, Nosebleed, Blood, Blood Drinking, poop in face, poop scare, delicious, Rough Sex, Torture, Cock & Ball Torture, Squirting, Rough Oral Sex, Rough Body Play, Groping, Sleep Groping, Party, Partying, Heavy Angst, Heavy Drinking, Orgy, Multiple Orgasms, Forced Orgasm, Orgasm, Dry Orgasm, Simultaneous Orgasm

read it on the AO3 at https://ift.tt/L0GtdXP

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蛇果

read it on the AO3 at https://ift.tt/ZDn80Ub

by qzzhou

Words: 6576, Chapters: 1/1, Language: 中文-普通话 國語

Series: Part 3 of パカカラ

Fandoms: おそ松さん | Osomatsu-san (Anime)

Rating: Teen And Up Audiences

Warnings: No Archive Warnings Apply, Underage

Categories: M/M

Characters: Matsuno Osomatsu, Matsuno Ichimatsu, Matsuno Karamatsu

Relationships: Matsuno Ichimatsu/Matsuno Karamatsu, Matsuno Karamatsu & Matsuno Osomatsu, Matsuno Ichimatsu/Matsuno Karamatsu/Matsuno Osomatsu

read it on the AO3 at https://ift.tt/ZDn80Ub

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再演

read it on the AO3 at https://ift.tt/58ly3E7

by qzzhou

Words: 12499, Chapters: 1/1, Language: 中文-普通话 國語

Series: Part 2 of パカカラ

Fandoms: おそ松さん | Osomatsu-san (Anime)

Rating: Mature

Warnings: Major Character Death, No Archive Warnings Apply

Categories: M/M, Other

Characters: Matsuno Osomatsu, Matsuno Ichimatsu, Matsuno Karamatsu

Relationships: Matsuno Karamatsu & Matsuno Osomatsu, Matsuno Ichimatsu/Matsuno Karamatsu, Matsuno Ichimatsu/Matsuno Karamatsu/Matsuno Osomatsu

read it on the AO3 at https://ift.tt/58ly3E7

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İt's Not How İt Should've Been

read it on the AO3 at https://ift.tt/7lzkCw5

by DonHiralover42

Todomatsu and Karamatsu spends 25 years living like Betas, but once Karamatsu gets in heat their life changes as whole

Words: 3783, Chapters: 1/?, Language: English

Fandoms: おそ松さん | Osomatsu-san (Anime)

Rating: Not Rated

Warnings: Creator Chose Not To Use Archive Warnings

Categories: M/M

Characters: Matsuno Karamatsu, Matsuno Todomatsu, Matsuno Osomatsu, Matsuno Ichimatsu, Matsuno Choromatsu, Matsuno Jyushimatsu, Matsuno Matsuyo, Matsuno Matsuzo

Relationships: Matsuno Karamatsu/Matsuno Todomatsu, Matsuno Karamatsu/Matsuno Osomatsu, Matsuno Ichimatsu/Matsuno Karamatsu

Additional Tags: Omega Verse, Omega Matsuno Karamatsu, Alpha Matsuno Todomatsu, Alpha Matsuno Osomatsu, Alpha Matsuno Ichimatsu, Alpha Matsuno Choromatsu, Beta Matsuno Choromatsu, Beta Matsuno Jyushimatsu, Angst, Mating Cycles/In Heat, Dubious Consent, Smut, Nipple Licking, Sibling Incest, Mating Bites, Biting, Mild Blood, Anal Sex, Pregnancy, Unplanned Pregnancy, Top Matsuno Todomatsu, Bottom Matsuno Karamatsu

read it on the AO3 at https://ift.tt/7lzkCw5

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Maid of Honor

read it on the AO3 at https://ift.tt/Nta0AR6

by yumeniz

18Karamatsu notices a mysterious cool-looking mafia boss that he soon makes a deal with into becoming his personal maid for all eternity.

Also Happy Maid Day!!!

Words: 4371, Chapters: 1/1, Language: English

Fandoms: おそ松さん | Osomatsu-san (Anime)

Rating: Explicit

Warnings: Graphic Depictions Of Violence, Major Character Death, Rape/Non-Con

Categories: M/M

Characters: Matsuno Ichimatsu, Matsuno Karamatsu

Relationships: Matsuno Ichimatsu/Matsuno Karamatsu, Matsuno Ichimatsu & Matsuno Karamatsu

Additional Tags: Maid, Sex, Oral Sex, Rough Oral Sex, Anal Sex, Anal Fisting, Anal Gaping, Chronic Pain, Painful Sex, Pain, Maids, Swords, Guns, Character Death, Death, Don Ichimatsu - Freeform, High School Karamatsu, Field Trip, aquarium, work for eternity, Matsuno Sextuplets Incest | BLMatsu (Osomatsu), NSFW, Rape, Rape/Non-con Elements, personal slave, dirty stick, Death Threats, Maid Day, Punishment, Mafia Boss, Innocent boy, gullible karamatsu, Suffering, Blood, Blood and Violence, Blood and Injury, death by broomstick, Fighting, Crime Scene, Moaning, Crying, Tears, Nipples, Nipple Torture, nipple sucking, dick sucking, Murder, fangs, Sweeping, Dirty Dick, weak ass, Molestation, Drug Use, Drugs, don mafia, Idols, ichimatsu sama, Praise Kink, Blood Kink, Size Kink, want some milk, cum on the carpet, Blood Stain, Fish, Fish Smell, groaning, Orgasm, Satisfaction, Oh My God, WHAT IN THE HELL

read it on the AO3 at https://ift.tt/Nta0AR6

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My Heart Bleeds Violet

read it on the AO3 at https://ift.tt/WKrq7ln

by thewritegrump

Fifteen iterations of Karamatsu wake up in a mysterious building and are given one way out: kill someone and get away with it.

Featuring: Karamatsu Matsuno (Fujio Rock/Band) Monroe Lameo (Drag Queen) Karamatsu Matsuno (Magical Girl) Karamatsu Matsuno (Phantom Thief) Karamatiu Matsunov (Vampire) Captain Phonic Angel (Hero) Karamatsu Matsuno (Teru Teru Bozu) Kalaus "Chauffer" Mats (Billionaire) Smilax "Mr. Shocking" Owl (Sweet Villain) Ao Andon (Youkai) Beelzebub (Akuma Rider) Karamatsu Matsuno (Florist) Karamatsu Matsuno (Mafia) Karla Pinefield (Musical) Karamatsu Matsuno (Lawyer)

Words: 8334, Chapters: 1/?, Language: English

Fandoms: おそ松さん | Osomatsu-san (Anime)

Rating: Mature

Warnings: Graphic Depictions Of Violence, Major Character Death

Categories: M/M

Characters: Matsuno Karamatsu, FIFTEEN Goddamn Karamatsus

Relationships: Matsuno Karamatsu & Matsuno Karamatsu, Matsuno Ichimatsu/Matsuno Karamatsu

Additional Tags: Alternate Universe - Not Related, Yeah you heard me there's fifteen Karamatsus, Danganronpa: Oops! All Karamatsu, KaraIchi is referenced but not an active part of the fic, killing game, Murder, Death, Mystery, Murder Mystery, Trials, Courtroom Drama, Drama, Dead Dove: Do Not Eat, Hurt No Comfort, Place your bets on who survives, Tell me all your theories, Matsuno Karamatsu-centric, Suffering Matsuno Karamatsu

read it on the AO3 at https://ift.tt/WKrq7ln

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In A Place Beyond Tonight

read it on the AO3 at https://ift.tt/xaF4UEG

by thewritegrump

Ichimatsu had loved Karamatsu for a long time, but could never work up the nerve to confess. He assumed that he had all the time in the world to do it; when he finds out that Karamatsu is moving away after graduation, he resolves to finally tell him how he feels.

Words: 4867, Chapters: 1/?, Language: English

Fandoms: おそ松さん | Osomatsu-san (Anime)

Rating: Explicit

Warnings: No Archive Warnings Apply

Categories: M/M

Characters: Matsuno Karamatsu, Matsuno Ichimatsu

Relationships: Matsuno Ichimatsu/Matsuno Karamatsu

Additional Tags: Alternate Universe - Not Related, Alternate Universe - High School, 18!Matsu, Romance, Crushes, Love Confessions, Requited Love, Cute, It will get spicy just give it a minute okay?, mild drama and angst, Ichimatsu cries a lot, Eventual Smut

read it on the AO3 at https://ift.tt/xaF4UEG

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What?

read it on the AO3 at https://ift.tt/nOYSHx7

by XxMitsubishixx

Born as the second child with 5 siblings I wonder how did I get into this mess?...

Words: 78, Chapters: 1/1, Language: English

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 (Manga)

Rating: Teen And Up Audiences

Warnings: No Archive Warnings Apply

Categories: Other

Characters: Matsuno Osomatsu, Matsuno Karamatsu, Matsuno Choromatsu, Matsuno Ichimatsu, Matsuno Jyushimatsu, Matsuno Todomatsu, Matsuno Matsuyo, Matsuno Matsuzo, Matsuno Sextuplets (Osomatsu), Chibita (Osomatsu), Reader

Relationships: Matsuno Ichimatsu/Matsuno Karamatsu, Matsuno Karamatsu & Matsuno Osomatsu, Matsuno Choromatsu/Matsuno Osomatsu, Matsuno Karamatsu/Matsuno Todomatsu

read it on the AO3 at https://ift.tt/nOYSHx7