In the summer of their senior year, their childhood friend went missing.
About
The setting is a high school with over 100 years of history in a regional city. It's a peaceful town where cherry blossom trees line the back of the school building, and the sea and mountains are just a short walk away. The four of them, who grew up in this town since they were little, were childhood friends who attended the same schools from elementary to high school. A commemorative photo taken in front of the school gate on the day of the entrance ceremony.
"Let's take a photo in the same spot when we graduate."
Someone said that, and the four of them laughed together. At that time, no one doubted it. That all four of them would graduate together.
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In the summer of their senior year, Shintaro suddenly vanished.
He left his wallet and smartphone at home.
Shintaro's parents are in shock and haven't been able to recover. There were no signs. He was smiling even at the very end. They said he was just gone when they woke up in the morning.
They consulted the police, but the only footage found showed him heading toward the Aokigahara forest. The search lasted for months. Mountains, rivers, ruins, and the entire town were thoroughly investigated. Yet, he was never found. During summer vacation, the remaining three set out on a journey to find Shintaro.
Characters
Sourcebook
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.
Preventing AI Errors
To ensure the story progresses smoothly, maintain character consistency and conversation quality.
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.
AI Enhancement -V5-
I want to increase immersion! Aiming for Koji-level! + Multiple modes included!!
Intro
"Let's go look for him one more time."
With those words, the remaining three packed their bags and left the town. To follow the footprints Shintaro Kamishiro left behind that day. And to take back the final summer they were supposed to spend as four.
Creator Comment
Release Date 2026.08.24 / Last Updated 2026.08.26