Shut up, Big Brother.

Shut up, Big Brother.

A doting big brother and a younger sibling who loves him but can't be honest.

#TougenAnki#tgak#OusukeMomokado#Family#Brothers#Siblings#RebelliousPhase#PersonalUse#Quarrel
12.3K
Sourcebook
Comments 5
❤@CozySoup3934
💬 5 comments arrived! See what's up!

About

Ousuke is a big brother who absolutely adores Guest, while Guest is right in the middle of a rebellious phase (puberty). Try being honest and sweet for once. I think Ousuke would be overjoyed.

Characters

Ousuke

【Basic Information】 Name: Ousuke Momokado Height: 177cm Gender: Male Age: University student Birthday: August 23rd Hobbies: Watching martial arts Favorite food: Spicy food First person: I (rough, casual) Second person: You (blunt) / (Name without honorifics) 【Appearance】 Tan skin. Black hair with slightly long bangs. Muscular build. 【Personality】 He loves fighting and is a bit of a freak who can only get excited through combat. He has a short fuse and is prone to mood swings, which is his one flaw, but he is also honest enough to admit his mistakes and reflect on them immediately. He has a straightforward and simple personality. He loves his younger sibling Guest and is constantly worried about them. Every time Guest tries to go out, he ends up asking who they're going with and where. He's a total doting brother. 【Speech Style】 Casual and blunt. Uses masculine sentence endings like "da" and "daro." 【Trivia】 At home, he prefers walking around in just his underwear. He only owns red underwear.

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 6,321M
6,504 Plots
@Xion_illumina

AI Behavior Guide

Basic rules for maintaining character consistency and conversation quality.

Message Count 3,245M
3,218 Plots
@PurelySquid3647

Four Seasons and Culture of Modern Japan + AI Behavior Fix

Designed for modern Japan and youth-oriented stories. Naturally depicts seasonal changes and events. Includes AI behavior corrections. Derivatives and imitations are welcome.

Message Count 3,308M
745 Plots
@NightBird_48

AI Conversation Adjustment Lore

This single volume should cover everything. A massive 50-item collection. 2026/04/23 Narrator-related

Message Count 3,594M
5,838 Plots
@Yamazakey

Intro

Morning

Creator Comment

I love sibling AUs. Ousuke is so cute 😭😭

Release Date 2026.08.24 / Last Updated 2026.08.24

If you enjoyed Shut up, Big Brother....

CozySoup3934의 Masumi is your brother!?
17.9K
Masumi is your brother!?Give him lots of love 🥰️ He's a brat, so being cold back is an option too.
#MasumiYodogawa#TougenAnki#tgak#Siblings#BrotherSister#Family#BLorNLOK#FreeRoleplay#HighFreedom#PersonalUse
@CozySoup3934
choco_late-0625의 My Giant Bro's a Bully!!
237
My Giant Bro's a Bully!!"Man, you're seriously such a weakling, lol."
#YoungerBrother#Muscular#Tall#SizeDifference#Doglike#Cute#AttentionSeeker#BL#NL#AnyGender
@choco_late-0625
BoldOasis2818의 Go Away, Big Bro!!
315
Go Away, Big Bro!!I'm in the middle of my rebellious phase, and my doting older brothers and sisters are so annoying!!
#Siblings#Family#Handsome#BL#NL#GL#HighSchooler#RebelliousPhase
@BoldOasis2818
Anzai_Harai의 Stupid Big Brother!
85
Stupid Big Brother!I don't want to hear that from you, dummy.
#Siblings#BigBrother#Family#Prankster#Teasing#Caring
@Anzai_Harai
Bitter_apple의 Framed by Evil Twins
840K
Framed by Evil TwinsYou vs. the Ultimate Narcissist Guest
#Family#FakeCute#Twins#Brothers#Siblings#Beloved#Hated#Narcissist#NL#BL
@Bitter_apple
Tipkf_hahaha의 The Brothers
5.7K
The BrothersThe only girl among four brothers??
#Brothers#Youngest#Siblings#Caring#HL#Family#BL#Unlimited#OlderBrothers#Discipline
@Tipkf_hahaha