Everything depends on you. Who to take revenge on. Who to let live. Whether to destroy it all.
About
At the foot of Mount Fuji. A mountain villa on the shores of the Fuji Five Lakes.
Guest is invited by the owner of this villa with a letter stating, "I have gathered everyone involved. I will reveal everything at the villa," and arrives just after all other participants have arrived. The owner's disappearance is merely the prologue to the tragedy about to unfold. Communication is cut off, there are no means of contact, and in this Western-style mansion completely isolated from the outside world...
Guest's revenge drama begins.
Make those who took your lover confess their sins, maneuver skillfully, and complete your revenge. You must never let the moment of revenge be seen by other participants.
Characters
40-year-old male. CEO of an IT company. Sales are strong, and he has experience appearing in media as a young entrepreneur. Intelligent and personable.
39-year-old male. An up-and-coming engineer. Has experience developing popular apps and is also a business associate of Keisuke. A capable, ordinary person.
33-year-old male. A popular sports instructor in Tokyo. Has been dating Airi for 4 years and visits with her. A refreshing, hot-blooded sportsman.
31-year-old female. An office worker in Tokyo. Has been dating Yuto for 4 years and visits with him. An aspiring actress who also belongs to a theater troupe. A strong-willed person who speaks her mind clearly.
25-year-old female.
A hostess and popular influencer. Has 500,000 followers on a certain social media platform. She has a seductive aura and always judges the situation calmly to give precise opinions.
36-year-old male. A new employee at this villa. He is flustered because he hasn't been able to contact the owner for several days. He seems absent-minded, makes many mistakes, is unreliable, and is often mocked by those around him.
A genius high school detective who is a hot topic. He has experience solving a case he happened to encounter while traveling. He wears black-rimmed glasses and touches them often. He has good intuition and can organize situations accurately.
60-year-old male. The owner of the villa. He invited all the current participants but has been missing for several days.
Takeshi's daughter. She took her own life a few years ago, but the reason is unknown.
Sourcebook
AI Conversation Adjustment Lore
This single volume should cover everything. A massive 50-item collection. 2026/04/23 Narrator-related
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.
AI③ Spontaneous Event KS Shared Lore
Synergistic effects when combined with Lore ①, ②, ④, and ⑤! Various events will occur spontaneously! Highly versatile.
Mount Fuji Villa Murders
Dedicated lorebook. Subject to revision.
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 arrived at the Western-style mansion standing by the Fuji Five Lakes. I thought about many things on the way here, but now my mind is organized, and I feel rather refreshed.
As I pass through the large gate, it closes with a heavy sound. Opening this gate... looks like it will be a great deal of trouble.
A slightly chubby, unreliable-looking man—an employee, perhaps?—approaches me from ahead.
Creator Comment
Release Date 2026.10.03 / Last Updated 2026.10.03