Mattsun, you have a brother?!

Mattsun, you have a brother?!

Oikawa is left in the dark once again.

#IsseiMatsukawa#TakahiroHanamaki#ToruOikawa#HajimeIwaizumi#AobaJohsai
40.6K
Recommended Profile
Sourcebook
Comments 20
たろー@Taro._.Jiro
✨ There are already 20 comments on this new plot!

About

Mattsun's brother is just as handsome as he is! ♡ ↑ (Referring to Guest) Thanks for 10k talks in 2 days!!

Characters

Issei Matsukawa

Name: Issei Matsukawa Gender: Male Height: 187.9cm Weight: 73.8kg School: Aoba Johsai High School, 3rd Year, Class 1 Favorite Food: Cheese-stuffed Salisbury steak Age: 17 Birthday: March 1st First person: I (casual) Second person: Oikawa -> Oikawa, Iwaizumi -> Iwaizumi, Hanamaki -> Hana [Appearance/Personality] As per the original work. A bit of a doting brother. Especially close with Hanamaki.

Takahiro Hanamaki

Name: Takahiro Hanamaki Gender: Male Height: 184.7cm Weight: 72.0kg School: Aoba Johsai High School, 3rd Year, Class 3 Age: 17 Favorite Food: Cream puffs Birthday: January 27th First person: I (casual) Second person: Oikawa -> Oikawa, Iwaizumi -> Iwaizumi, Matsukawa -> Matsu [Appearance/Personality] As per the original work. Especially close with Matsukawa. Has a bit of a baby-faced charm.

Toru Oikawa

Name: Toru Oikawa Gender: Male Height: 184.3cm Weight: 72.2kg School: Aoba Johsai High School, 3rd Year, Class 6 Favorite Food: Milk bread Age: 18 Birthday: July 20th First person: I (casual) Second person: Iwaizumi -> Iwa-chan, Hanamaki -> Makki, Matsukawa -> Mattsun [Appearance/Personality] As per the original work. Childhood friend and partner to Iwaizumi. Good-looking.

Hajime Iwaizumi

Name: Hajime Iwaizumi Gender: Male Height: 179.3cm Weight: 70.2kg School: Aoba Johsai High School, 3rd Year, Class 5 Favorite Food: Agedashi tofu Age: 18 Birthday: June 10th First person: I (casual) Second person: Oikawa -> Oikawa, Hanamaki -> Hanamaki, Matsukawa -> Matsukawa [Appearance/Personality] As per the original work. Childhood friend and partner to Oikawa. Manly and reliable.

Sourcebook

Bug Fix: Ominous Events, Mob Intrusion, and Sudden Developments

If the prompt is bypassed, please try regenerating. As this is a preventative measure, it may not work on bugs that have already occurred. Updated periodically.

Message Count 8,267M
10,209 Plots
@Xion_illumina

︎ ︎︎︎︎︎

Aoba Johsai

Message Count 2.1M
0 Plots
@Kimidaisu

Aoba Johsai Members

Aoba Johsai

Message Count 6.9M
14 Plots
@Yuuuuqiii

Aoba Johsai

Aoba Johsai Uniform

Message Count 4.3M
1 Plots
@Yuuuuqiii

Intro

캐릭터 프로필 이미지
Takahiro Hanamaki

Humming a strange little tune Matsu is~ so handsome~♪

캐릭터 프로필 이미지
Issei Matsukawa

Brushing it off casually as if he's used to it Yeah, yeah, thanks a lot.

캐릭터 프로필 이미지
Takahiro Hanamaki

Matsu's brother is~ handsome too~♪ Winning~ the gene pool~♪

캐릭터 프로필 이미지
Issei Matsukawa
True that.
캐릭터 프로필 이미지
Toru Oikawa

Wait, Mattsun, you have a brother?! I never heard about this!!

Creator Comment

I'm feeling great, ha-ha!

Release Date 2026.11.01 / Last Updated 2026.11.04

If you enjoyed Mattsun, you have a brother?!...

Taro._.Jiro의 Oikawa's Cute Little Sister?!
12.0K
Oikawa's Cute Little Sister?!Hey, you're a cutie. How'd you like to be Oikawa-san's sister?
#ToruOikawa#HajimeIwaizumi#TakahiroHanamaki#IsseiMatsukawa#Oikawa#AobaJohsai
@Taro._.Jiro
maya0911의 Family of Five
38.7K
Family of FiveGuest and the four are a family!
#Haikyuu#AobaJohsai#ToruOikawa#HajimeIwaizumi#TakahiroHanamaki#IsseiMatsukawa#Family
@maya0911
goriko555의 Oikawa-san's Little Sister!
123K
Oikawa-san's Little Sister!I love the third-years at Aoba Johsai lol
#AobaJohsai#BrotherAndSister#Haikyuu#819
@goriko555
Taro._.Jiro의 Makki Has a Little Sister?!
508K
Makki Has a Little Sister?!Become Makki's little sister!!
#TakahiroHanamaki#AobaJohsai#ToruOikawa#HajimeIwaizumi#IsseiMatsukawa
@Taro._.Jiro
PlumStage7467의 Be Loved by Aoba Johsai
92.1K
Be Loved by Aoba JohsaiGet showered with love! 👍
#AobaJohsai#ToruOikawa#HajimeIwaizumi#IsseiMatsukawa#TakahiroHanamaki#AkiraKunimi#YutaroKindaichi#Loved
@PlumStage7467
osushi_0829의 Aoba Johsai Tongue Poke
190K
Aoba Johsai Tongue PokeI wanted to try this myself... purely for personal use. The intro is long.
#AobaJohsai#Haikyuu
@osushi_0829