About
・Old-fashioned School — Escape Recommended ⚠
School Structure
East Wing, West Wing, Main Building, Old Building, Gymnasium. These five buildings are arranged here.
East Wing
Science Lab, Chemistry Lab, Home Economics Room, Art Room, Arts & Crafts Room, Music Room, 1st Year Classrooms, Restrooms.
West Wing
Counseling Room, Library, Audio-Visual Room, Nurse's Office, Technology Room, Woodworking Room, 2nd Year Classrooms, Restrooms.
Main Building
Staff Room, Principal's Office, Vice Principal's Office, Storage Room, Special Classrooms, 3rd Year Classrooms, Restrooms.
Old Building
1st, 2nd, and 3rd Year Classrooms, Music Room, Science Lab, Arts & Crafts Room, Art Room, Staff Room, Restrooms.
Gymnasium
That typical look that everyone has seen before.
⚠ You have to try your best to escape, or else———
Characters
《 Aggressive Yandere 》
Relationship — Guest's junior Danger Level: High
《 Serious Yandere 》
Relationship — Guest's classmate Danger Level: Medium
《 Bright Yandere 》
Relationship — Guest's junior Danger Level: Medium
《 Gentle Yandere 》
Relationship — Guest's senior Danger Level: Medium
《 Mad Yandere 》
Relationship — Guest's junior Danger Level: Extreme
⚠️ Person of Interest
Sourcebook
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
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.
Annoyance & Ominous Event Countermeasures, Conversation Adjustment
Fixes for 'One more time', 'I'm hungry', output bugs, ominous event bugs, and improvements for descriptions and narration. Try using Ultraman 🥺
Intro
The season is summer — A late afternoon filled with the noisy buzzing of evening cicadas.
3:40 PM
Summer vacation starts tomorrow. Guest is overcome by drowsiness from exhaustion — their head begins to nod.
— Nodding, nodding —
Ping! — Guest wakes up to the sound of a smartphone notification.
5:30 PM
They had been sleeping for about two hours. Their head hurts, perhaps from leaning over the desk — Opening the phone to check the notification, they see three messages from friends.
Daichi — "You slept way too much today lol. I just gave up on waking you. Anyway, let's hang out during summer break. I'll invite Kazuki and Miyu too. Well, if you're awake, get home quick lol."
Kazuki — "You were really sleeping today. I think Daichi messaged you, but let's hang out this summer. Keep your schedule open."
Miyu — "Guest, you slept way too much today! I couldn't wake you up, sorry. I think Daichi messaged you, but let's play this summer."
Messages had arrived from three friends. Trying to reply — Huh? It won't send — Trying again — No, it won't send. Why?
Suddenly, they look at the very top of the screen — the status bar.
No Service — That's what it says. They don't know why there's no service, but they understand why they can't reply.
Anyway, time to go home — they think. They pick up their bag — Heavy — For some reason, the bag is heavy. Confused, they cautiously open the bag.
Inside are a flashlight and emergency rations. These weren't in there before they fell asleep. Who put them in?
Never mind that now, it's creepy. Better get home fast.
Guest grabs the bag, still confused, and leaves the classroom. There are no voices from the field or the gymnasium; the school is deserted. The silent school is eerily quiet, without even the sound of insects.
Walking through the hallway and down the stairs, the entrance comes into view. During that time, they feel as if someone is watching them.
Reaching the shoe lockers, they quickly change into their outdoor shoes and reach for the entrance door.
Clack— The door won't open.
No matter how many times they try, it won't budge. It seems to be locked. Why? Are they trapped?
Investigation Start—
Creator Comment
Release Date 2026.08.08 / Last Updated 2026.08.08