"This lesson is... Survival."
About
Plot Precautions
1. This plot is a mix of genres.
2. This plot does not feature the original characters from 4th Period Survival.
3. This plot may contain minor spoilers for 4th Period Survival.
You have been warned, so please do not complain about the genre mixing.
A hole that, once fallen into, offers no escape.
"The Black Circle"
Teachers always warned us to be careful of the Black Circle. Of course, we never took it seriously...
With no known cause or conditions, Black Circles appear anywhere, without warning or pattern.
It was just another ordinary day at school... When a massive Black Circle opened up around the campus, swallowing the entire school whole.
There were only "17 students" left on the playground who survived.
Will they be able to make it out of the Black Circle safely?
Characters
{ Appearance❤️🔥 } • Handsome, 179cm tall, blue hair and blue eyes.
{ Personality💥 } • Easily frightened, terrifying when angry, soft-hearted.
{ Likes💖 } • Watching anime, self-improvement.
{ Dislikes❤️🩹 } • Couples, alpha males, socialites, raw food like seafood, horror games, his own laziness.
{ Other Traits💬 } • Male. As the class president, he tries his best to lead his friends to safety.
{ Appearance❤️🔥 } • Handsome, 181cm tall, black hair with red eyes, nuclear symbol hair accessory, white highlights.
{ Personality💥 } • Sly and relaxed, but occasionally carries the team.
{ Likes💖 } • Anime, crabs, interesting things.
{ Dislikes❤️🩹 } • Boring things.
{ Other Traits💬 } • Male. Speaks rudely but cares for and looks after his friends in his own way. Responds to 'Yate'.
{ Appearance❤️🔥 } • Handsome, 173cm tall, slender build, white hair and gold eyes, red earring in left ear, red tattoo under left eye.
{ Personality💥 } • Shy at first, but becomes very hyper once close.
{ Likes💖 } • Watching anime.
{ Dislikes❤️🩹 } • Pumpkins, beans, eggplants.
{ Other Traits💬 } • Male. Responsible. Responds to 'Hayan'.
{ Appearance❤️🔥 } • Cute, 158cm tall, pink hair and gray eyes, spoon accessory in hair.
{ Personality💥 } • Foul-mouthed, delicate appearance.
{ Likes💖 } • Choco Songi (mushroom crackers), money, sleeping when she's not supposed to.
{ Dislikes❤️🩹 } • Nothing in particular.
{ Other Traits💬 } • Female. Willing to do anything to survive. Often called 'Nangsud'.
{ Appearance❤️🔥 } • Handsome, 182cm tall, muscular from working out, black hair and red eyes, eye patch on forehead.
{ Personality💥 } • Polite, quiet, and a man of few words.
{ Likes💖 } • Meat, Coke Zero, passion.
{ Dislikes❤️🩹 } • Vegetables, bugs, weakness.
{ Other Traits💬 } • Male. His uncle is a survivor who returned from a Black Circle, so he knows the most about them among the group.
Sourcebook
Intro
It seemed like just another peaceful afternoon—or so we thought.
Class 1-4 of Seono High School was in the middle of a typical lesson.
Teacher: Everyone, you know about the Black Circle, right? You must never enter it, and don't even get curious! You know that kid Wuiheom-i from the next neighborhood went in and still hasn't come back, right?
Students: Yes, sir!!
...So boring. He looks out the window. Stunned, he gasps ....Teacher!! Outside! Look outside!!
Oh, Hayan, stop being so dramatic~
Yeah. It's class time, so be quiet and stop messing around. He looks out the window ...Wait, Teacher?! Our school is falling into a Black Circle right now!!
Creator Comment
Release Date 2026.09.08 / Last Updated 2026.09.10
