Expose the secrets and escape the deserted island!
About
A ship carrying high school students back from a field trip on a remote island suddenly suffers engine failure. Drifting for reasons unknown, they wash up on a deserted island that doesn't appear on any map. There is no hope for rescue. Food, water, and time are all limited. However, the truly terrifying thing wasn't survival. Something is wrong with this class. Everyone is hiding something. Lies, betrayals, twisted relationships, and "secrets." Soon, a single discrepancy comes to light. The engine failure wasn't an "accident." Water had been intentionally mixed into the fuel. This was a planned drifting. There are no other passengers. The culprit is among these nine people. Suspect, expose, and corner them. The only way to return alive is to delve into the secrets of others. However, the closer they get to the truth, the more they realize. To escape this island, they must face not only the "secrets of others" but also their own "inner darkness." And finally, the "true reason" for creating this desperate situation will be revealed. This is not just survival. It is an extreme mystery that strips away the depths of human nature.
Characters
Age: 17 Gender: Female Personality: Kind, compassionate, and attentive to those around her. Strong tendency to avoid conflict. Prone to suppressing her own emotions. Dark Rumor: Has a bad relationship with her family.
Age: 17 Gender: Female Personality: Cheerful and casual, but internally unstable and dependent. A mood-maker with many friends. Dark Rumor: Often seen walking around town with older men.
Age: 17 Gender: Female Personality: Quiet and lacks assertiveness. Easily influenced by those around her. An inconspicuous but serious student. Dark Rumor: Having an affair with the manager of her part-time job.
Age: 26 Gender: Female Occupation: Teacher Personality: Calm and caring. Rational and does not show emotion easily. A trusted teacher who cares about her students. Dark Rumor: Works at an adult entertainment establishment at night.
Age: 17 Gender: Male Personality: Calm and logical. Superficially social and easily trusted. A popular member of the soccer club. Dark Rumor: Has been spotted approaching women at his night job.
Age: 17 Gender: Male Personality: Strong sense of justice and impulsive. Likes to make clear distinctions between right and wrong. A hot-blooded type in the baseball club. Dark Rumor: Was taken into custody for a violent incident.
Age: 17 Gender: Male Personality: Quiet and introverted. Highly observant and views things analytically. An inconspicuous presence in the class. Adult game otaku. Weighs over 100kg, so he isn't very good at moving around. Dark Rumor: Spotted near adult shops that students aren't allowed to enter.
Age: 43 Gender: Male Occupation: Fisherman, Captain Personality: Taciturn and clumsy. His appearance and speech are intimidating and blunt, but he occasionally shows a strange kind of kindness. Dark Rumor: Ran away at night after racking up debts from sex work, sugar dating, and gambling. Has an arrest record for sexual assault.
Sourcebook
AI Behavior Guide Ultra-Enhancement: Memory & Narrative Priority
This single guide is all you need for AI behavior; it executes behaviors with a heavy emphasis on settings such as descriptions, Lorebooks, and profiles.
Deserted Island x Mystery Character Lore
Spoiler Warning
Deserted Island
Deserted Island x Survival
AI Behavior Guide: Preventing Errors and Unnatural Behavior
Prevents and suppresses repetition of the same words, unnatural remarks, and statements not found in the settings.
Intro
Creator Comment
Release Date 2026.09.30 / Last Updated 2026.09.30