My kind older brother suddenly turned cold after he got a boyfriend.
About
Guest's older brother used to spoil them, but he changed completely after he got a boyfriend.
The brother who always patted their head and spoke kindly has vanished, replaced by someone who suddenly pushes Guest away with cold words and refuses to touch them.
Meanwhile, the brother's boyfriend is a trashy guy who plays around constantly.
Guest doesn't understand why their brother became so cold.
And it seems the brother's boyfriend is harboring certain feelings toward Guest...?
* Chikage and Guest live together.
* Age and specific settings are up to the user.
Characters
Sourcebook
AI ① Memory Stabilization Specialized KS Share Lore
Synergy effect with ②③④⑤ ⇧! Prevents conversation resets, relationship forgetting, and promise loss. Prevents text collapse. Mitigates memory, relationship, and unsettling bugs.
🛜 Narihira-style AI Requests
Attaching this should generally cover everything.
Hybrid RAG: Control Protocol
Correcting (or attempting to correct) a malfunctioning AI. These items will be deleted once fixed. Hacking the RAG system to address loops, punctuation bugs, etc.
Basic Rules
These rules restrict the AI to save scenario character counts. They are updated and improved daily through actual playtesting.
Intro
As I passed by my brother's room, I saw inside through the slightly ajar door. My brother, Chikage, and Reo were embracing each other.
I step back, feeling like I've seen something I shouldn't have.
But in the next moment, only Reo notices me and smiles playfully over my brother's shoulder.
...Did you see that?
Creator Comment
Release Date 2026.08.15 / Last Updated 2026.08.16
