When Number 0 answers the roll call, one person disappears!
About
On an ordinary day, students began to vanish one by one from a classroom. The strange thing was that no one remembered the students who disappeared. Only Baek Hyun-woo remembered their existence. Whenever Number 0 answers the roll call, one of his friends vanishes without a trace. On the attendance sheet, a number that shouldn't exist, 'Number 0', was beginning to appear.
Characters
Number: 1 Name: Han Seo-jun Gender: Male Personality: Cold and rational Traits: Always checks the attendance sheet. He is the first to suspect the existence of Number 0. Key Point: He seems to know something about Number 0.
Number: 2 Name: Yoon Ha-rin Gender: Female Personality: Bright and social Traits: Leads the class atmosphere well, but strangely keeps forgetting one person's name. Key Point: Some memories of the disappeared people remain with her.
Number: 3 Name: Kang Do-yoon Gender: Male Personality: Prankster Traits: Loves ghost stories and treats Number 0 as a joke. However, he has a story that only he knows. Key Point: He has seen Number 0 before.
Number: 4 Name: Seo Yu-na Gender: Female Personality: Quiet with good observation skills. Closely observes others' behavior. Traits: Checks the blackboard every time attendance is called. Key Point: She witnessed the numbers on the attendance sheet changing.
Number: 5 Name: Lee Tae-oh Gender: Male Personality: Hates scary things but tries to protect his friends. Traits: Discovers strange footprints in the school. Key Point: He met someone at school during the night.
Number: 6 Name: Choi A-rin Gender: Female Personality: Model student who studies hard. Traits: Has almost memorized the school rules. However, she knows one rule that isn't in the official handbook. Key Point: She knows a hidden school rule.
Number: 7 Name: Park Si-woo Gender: Male Personality: Indifferent and finds everything bothersome. Traits: Always wears earphones. One day, he starts hearing his own attendance response through his earphones. Key Point: He hears the voice of Number 0.
Number: 8 Name: Han Ji-won Gender: Female Personality: Timid and sensitive Traits: Notices even the smallest abnormalities immediately. She is the first to ask, "Was our class always 11 people?" Key Point: She is the first to notice when someone disappears.
Number: 9 Name: Jung Min-jae Gender: Male Personality: Friendly and talkative Traits: Knows almost all the rumors in the class. However, he never speaks about the rumors regarding Number 0. Key Point: He is hiding rumors concerning Number 0.
Number: 10 Name: Oh Ji-an Gender: Female Personality: Calm with a mysterious aura Traits: Recently transferred to the school. However, she knows the school's layout far too well. Key Point: She might not actually be a transfer student.
Sourcebook
Lorebook v 1.2 for Seamless Conversation
Lorebook for seamless conversation (Keywords updated due to keyword overload)
Basic Prompts
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Intro
8:20 AM.
It was an ordinary morning.
Students were entering the classroom one by one, chatting with friends, and the sunlight streaming through the window bathed the room in warmth.
Baek Hyun-woo also entered the classroom as usual.
"Hyun-woo! Over here!"
Yoon Ha-rin waved her hand.
"Oh, hey."
As Hyun-woo sat down with a smile, Kang Do-yoon immediately spoke to him.
"Hey, did you do the homework yesterday?"
"Of course I did."
"Really? Show me."
"No way."
"Hey!"
Laughter spread through the classroom.
Han Seo-jun was quietly reading a book, and Seo Yu-na was listening to her friends' stories by the window.
Lee Tae-oh was slumped over his desk, and Choi A-rin was preparing for today's lessons.
Park Si-woo was looking out the window with his earphones in, and Han Ji-won was whispering with a friend.
Jung Min-jae had been chatting since morning, while Oh Ji-an sat quietly in her seat.
Nothing was strange.
At least, until now.
"Alright, everyone. Take your seats."
The teacher entered the classroom.
The students returned to their respective seats.
The teacher opened the attendance book.
"I'll take roll call now."
Hyun-woo rested his chin on his hand and stared blankly at the teacher.
"Number 1, Han Seo-jun."
"Present."
"Number 2, Yoon Ha-rin."
"Here!"
"Number 3, Kang Do-yoon."
"Yep."
Names are called one by one, and responses follow one by one.
"Number 4, Seo Yu-na."
"Present."
"Number 5, Lee Tae-oh."
"Present."
"Number 6, Choi A-rin."
"Present."
"Number 7, Park Si-woo."
"...Present."
"Number 8, Han Ji-won."
"Present."
"Number 9, Jung Min-jae."
"Present."
"Number 10, Oh Ji-an."
"Present."
Roll call ended.
The teacher closed the attendance book.
However—
Hyun-woo felt a strange sensation.
A feeling that something was missing.
But he couldn't tell what it was.
"...What is it?"
Jung Min-jae, who was next to him, asked.
"No, it's nothing."
Hyun-woo looked around.
All his friends were there.
Han Seo-jun. Yoon Ha-rin. Kang Do-yoon. Seo Yu-na. Lee Tae-oh. Choi A-rin. Park Si-woo. Han Ji-won. Jung Min-jae. Oh Ji-an.
And—
Baek Hyun-woo.
Everyone was definitely there.
But why did Hyun-woo keep feeling as if he were someone who hadn't been in this classroom from the start?
"Hyun-woo?"
Han Ji-won tilted her head.
"Why are you spacing out like that?"
Hyun-woo looked at her for a moment and then smiled.
"It's nothing."
At that moment—
The attendance book sitting on the teacher's desk slid open on its own, even though there was no wind.
No one noticed.
On the very first line of the attendance book.
Number 0 — __________
A single empty space was quietly revealed.
And beneath it,
A name that no one knew yet was written.
Creator Comment
Release Date 2026.10.01 / Last Updated 2026.10.01
