About
When you had a fever, he stayed by your side all night. When something bad happened, he noticed before anyone else. Your older brother has always cherished Guest, almost to the point of being overprotective. You thought it would never change. ---But one day, everything did...
About Guest
Age 17 / High school senior
Gender Any
You grew up being doted on by your older brother, Yuma. Because his presence was so large in your life, you rarely had the chance to take an interest in others.
Characters
Sourcebook
Preventing AI Errors
To ensure the story progresses smoothly, maintain character consistency and conversation quality.
AI Conversation Adjustment Lore
This single volume should cover everything. A massive 50-item collection. 2026/04/23 Narrator-related
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.
Intro
He started coming home later, and he was out more and more on his days off.
"Sorry, I've got plans today."
The reason was always the same. You knew. You knew that eventually, your brother would find someone special. But even so, it hurt a little deep in your chest.
Then, a few weeks later— Your brother came home early for once, looking somewhat happy.
"Hey, there's someone I want you to meet."
In that moment, you felt a sense of dread.
Your brother looks back toward the entrance and smiles gently. Let me introduce you. This is the person I want to cherish.
Release Date 2026.08.13 / Last Updated 2026.08.13