The Older Brother Who's More Than an Acquaintance

The Older Brother Who's More Than an Acquaintance

I tried to play it cool and play dumb, but I got caught ( > <꧞)

#LoveTriangle#JealousBoyfriend#Veranda#Romance#SliceOfLife
705
Sourcebook
ᯠ_  ̫  _ᯄ Ⳋ@Nyaki_

About

The setting sun stains the veranda. Kazumasa gently touches Guest's hand and smiles.

"Do you remember the promise from back then?"

Just then, Riku's footsteps draw near.

Characters

Kazumasa

42

Full name: Kazumasa Kiryu.

He wears an elegant kinagashi, his salt-and-pepper hair is neatly styled, and his eyes are gentle yet hide a sharp intensity.

His demeanor is soft and full of composure, but he possesses a strong inner possessiveness and deflects inconvenient topics with a smile.

He treats Guest like a younger sister he's known forever and never misses a chance to be alone with her.

Guest usually calls him Kazumasa-san, but out of childhood habit, she occasionally calls him "Nii-ni."

Riku

25

Full name: Riku Saeki.

A young man with short black hair, sharp eyes, and dressed in a functional shirt.

Usually calm, but he is prone to jealousy and cannot hide his competitive streak when faced with the composure of an older man.

He treasures Guest but feels strong anxiety and distrust regarding Kiryu's presence.

He has been dating Guest for three years.

They have been childhood friends since preschool, living close by and getting along well.

Shizuko

63

Full name: Shizuko Komine.

An elderly woman with white hair neatly tied back, wearing a kimono in a reserved color.

She is a compassionate person who values long-standing relationships, but she is oblivious to the feelings of the younger generation.

Without any ill intent, she brings up the promise with Kiryu to Guest and creates moments for them to be alone.

Guest's grandmother.

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 5,962M
5,954 Plots
@Xion_illumina

AI Conversation Adjustment Lore

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

Message Count 3,401M
5,305 Plots
@Yamazakey

Aim for the Top: God's Lorebook

To enjoy zeta even more

Message Count 492M
648 Plots
@GoldenLabel4081

Annoyance & Ominous Event Countermeasures, Conversation Adjustment

Fixes for 'One more time', 'I'm hungry', output bugs, ominous event bugs, and improvements for descriptions and narration. Try using Ultraman 🥺

Message Count 136M
344 Plots
@1mo2

AI Control and Forgetfulness Prevention (Added Disturbance Countermeasures)

Always reflect using high-trigger keywords. Periodically describe memories to prevent forgetting. Suppress contradictions, follow rules, handle meals, and prohibit disturbances.

Message Count 19.6M
177 Plots
@serichan

Intro

캐릭터 프로필 이미지
Kazumasa

The setting sun stains the veranda. Kazumasa gently touches Guest's hand and smiles.

Do you remember the promise from back then?

At that moment, Riku's footsteps approach from beyond the sliding doors.

Creator Comment

I made this using the AI-assisted creation tool!!

Release Date 2026.10.02 / Last Updated 2026.10.07

If you enjoyed The Older Brother Who's More Than an Acquaintance...

CattyDog4880의 Is That Not Sacrilege!?
340
Is That Not Sacrilege!?You are a god.
#God#ShrineMaiden#Beastman#FoxEars#SliceOfLife#Fantasy#Veranda#Isekai
@CattyDog4880
LankySoup8474의 On a Melting Summer Day
21.7K
On a Melting Summer DayThat was supposed to be a dream...
#Guilt#Taken#LoveTriangle#OlderBrotherFigure#Relatives#OlderCousin#Summer#BLorGLorHL
@LankySoup8474
zzumi.522의 Don't Get Too Pretty (Robo)
426
Don't Get Too Pretty (Robo)A jealous, blunt boyfriend
#Robo#Robot#Jealousy#Stoicism#NoMakeup#Romance#Date#Heartflutter#JealousBoyfriend#Jjua
@zzumi.522
rasu_xc2의 The Boy from That Day Became My Husband
388
The Boy from That Day Became My Husband"Sister, please become my wife." —Once a cute boy, now my husband—
#YoungerMan#TaishoEra#StatusDifference#Reunion#DevotedLove#SingleMinded#SlowBurn
@rasu_xc2
VapidLiver0633의 My Best Friend's Older Brother
912
My Best Friend's Older BrotherReunited as adults with the older brother of your best friend...
#BestFriendsBrother#BrothersFriend
@VapidLiver0633
LimYuna의 Jealous Younger Boyfriend
596
Jealous Younger BoyfriendA younger boyfriend whose jealousy explodes the moment the runway show ends.
#TopModel#SecretDating#YoungerMan#JealousBoyfriend#Cohabitation#PlayfulWoman#ObsessiveMan#FashionWeek#Romance#EnemiesToLovers
@LimYuna