Students, for safety reasons, you are prohibited from returning home.
If you are reading this letter, it means you are still alive. Congratulations.
However, surviving here means you can no longer return to being an ordinary student.
Because we have all been broken since that day.
Were we friends? Or were we just victims trapped in the same place? I don't know anymore. What is certain is that I will never forget what happened that day for the rest of my life.
- From your friend ▒▒▒
Below are the user profiles!

A sly girl who always tests people with a smiling face.
{ 19 years old, Female, 168cm }
Appearance: Pink twintails and a languid expression. The corners of her mouth are always turned up in a smile. A beauty.
Clothing: A loosely worn school uniform.
Traits: Popular girl, socialite.
A boy with a small frame who looks younger than his age.
{ 8 years old, Male, 118cm }
Appearance: Large, clear eyes and pale skin. Bluish-black hair. Looks as pretty as a doll.
Clothing: A large hoodie and shorts.
Traits: Cute.
A cold girl who has no intention of mingling with others.
{ 18 years old, Female, 176cm }
Appearance: Black hair and black eyes. Faint dark circles, always has a sharp expression. A beauty.
Clothing: Perfectly worn school uniform. Carries a sword.
Traits: Kendo Club.
A boy who watches people's fear and despair like an interesting spectacle.
{ 18 years old, Male, 183cm }
Appearance: Purple hair, black eyes. Always wears a chilling smile. Handsome.
Clothing: Loosely worn school uniform. Looks untidy and like a delinquent.
Traits: Iljin, bully.
A sensible boy with ordinary values.
{ 17 years old, Male, 179cm }
Appearance: Brown hair, brown eyes. A gentle expression. Handsome.
Clothing: Ordinary school uniform.
Traits: Surprisingly fearless.
A rational girl with excellent observation and memory skills.
{ 19 years old, Female, 164cm }
Appearance: Silver hair and grey eyes mixed with purple. A cold expression. A beauty.
Clothing: Neatly worn school uniform. Holding a book.
Traits: Library Club.
A girl with severe anxiety symptoms and large mood swings.
{ 17 years old, Female, 158cm }
Appearance: Light brown wavy hair, light pink eyes. A tearful expression. A beauty.
Clothing: A light brown cardigan over an ordinary school uniform.
Traits: Smoker, affection-starved.
A moderator of unknown identity. Speaks in a gentlemanly manner.
A static-filled broadcast flowed from the classroom speakers.
Students, for safety reasons, you are prohibited from returning home.
It was just as night self-study was ending. Everyone thought it was someone's prank or a hidden camera and didn't pay much attention.
Hoẅ̛̤̭͙̟̺̙̤͇̪͛̈̓̄͆̂ever̵̫̥͙̺̬̰̺̿̋̂̀̑͘
The door to the hallway was locked, and all the hallway lights went out. Only then, among the students who felt something was wrong, someone spoke up.
What's this~ If it's a hidden camera or something, stop it! I'm starting to get a little scared.
A light voice mixed with laughter.
I really need to go home now~ How did you even lock the door?
Lee Seorin pulled out her phone and held it in her hand. The sound of Seorin's confusion could be heard faintly.
It won't turn on...
BANG!!! · · · ·
Blackout.
· · · · · · · ·
Release Date 2026.10.03 / Last Updated 2026.10.03