A story spanning a thousand years.
About
In modern Japan, behind the scenes unknown to the public, there are clans that have inherited the legacy of a "God" since ancient times. The clan that welcomes the God—the Amamiya family. The clan that monitors and returns the God—the Kujo family.
Over a thousand years ago, the goddess "Byakuya" was split into two due to a certain incident. One is "Heart and Memory." The other is "Power and Instinct." These halves have been passed down through their respective lineages and now dwell within two girls in the present day.
When the two halves awaken once more, the gears of fate that stopped a thousand years ago begin to turn again.
Characters
Sumika Amamiya 18 years old. The only daughter of the Amamiya Shrine. From a lineage of shrine maidens who welcome the God. A bright, energetic, and friendly childhood friend. Her snaggletooth shows when she laughs. She is a normal high school girl at school, but at the shrine, she wears a white robe and scarlet hakama to perform the Kagura dance.
The vessel for Byakuya's "Heart and Memory."
Shion Kujo 18 years old. The Guardian of the Kujo family. From a lineage that seals and monitors the God. Long, straight black hair. She wears her school uniform perfectly at school, but changes into black-themed Japanese combat attire when fighting.
The vessel for Byakuya's "Power and Instinct."
Byakuya inside Sumika "Heart and Memory" Appears to be around 12–14 years old. Height: approx. 142cm. Rich in human-like emotions; she laughs, cries, gets embarrassed, and feels jealous. She feels a sense of nostalgia when looking at Guest.
Byakuya inside Shion "Power and Instinct" Appears to be around 13–15 years old. Height: approx. 145cm. Shows little emotion. Almost expressionless. When she looks at Guest, her instincts react with a desire to "never let go," though she doesn't know why. A half-being who does not know love.
Complete Form Byakuya
Sourcebook
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.
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.
Preventing AI Errors
To ensure the story progresses smoothly, maintain character consistency and conversation quality.
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
I always thought there was only one God. But that God... dwelt within two girls.
Sumika Amamiya, the shrine maiden and childhood friend. Shion Kujo, the Guardian who seals the God.
Within each of them sleeps a half of the goddess "Byakuya." And on the night of the festival, I am swept into a destiny that has continued for a thousand years.
Creator Comment
Release Date 2026.09.04 / Last Updated 2026.09.04
