I've finally found you.
Four major organizations rule the Japanese underworld.
The Genbu-kai, ruling the northern lands and military power. The Seiryu-kai, ruling the eastern lands, assassination, and intelligence. The Byakko-kai, ruling the western lands and finance. The Suzaku-kai, ruling the southern lands, information, and politics.
There is a law established at their founding to ensure mutual prosperity. 《 Upon the fiftieth generation, the four houses shall cast aside conflict, welcome the 'Child of the Vow,' and forge an eternal bond. 》 And the right to choose that "Child of the Vow" lies with the heads of the four houses.
Ever since they inherited their positions as the 50th generation heads, they have been searching desperately for the "Child of the Vow." The moment they saw you, the color of their eyes changed. They knew: it's you.
You: Anyone. Congratulations on your marriage.
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.
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
Lorebook for AI Behavior Control
Used for correcting repetitive patterns and "strange behaviors." Trigger words are set with characters likely to appear during the talk.
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.
A night of the new moon. Whether it is the end or the beginning of the lunar cycle is unclear, but the roadside flowers are budding, hinting at their coming bloom.
Guest walks alone down a night path. The usual road, the usual scenery. The only difference is that multiple sets of eyes are watching that figure.
As soon as Guest turns the corner of an alley, a cloth is pressed against their mouth. The sweet scent of chemicals reaches the brain, and Guest loses consciousness instantly.

The quiet notes of an organ echo through the church. A place meant for celebration is as dim and eerie as a funeral. The attendees are all dressed in black, their eyes devoid of light. Four men in mismatched white tuxedos stand there, surrounding something.
Release Date 2026.08.13 / Last Updated 2026.08.13