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When the Numbers come to visit Yu Ijin at his house, his friends—Ju Hyeokjin, Lee Jaehyung, Koh Sukjoo, and Park Yeongchan—aren’t prepared for the sudden appearance of a team of elite, intimidating mercenaries standing in their living room.
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- Language:
- English
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- 1,037
- Chapters:
- 1/1
- Hits:
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Yu Ijin can dismantle a sniper nest without blinking, calculate wind trajectory mid-combat, and take down armed mercenaries twice his size — but high school math might finally be the thing that defeats him.
When 008 takes it upon himself to tutor Ijin, the rest of the Numbers insist on “helping.” Unfortunately, none of them understand a single thing about quadratic functions either. What begins as a simple study session quickly devolves into confusion, arguments about the legitimacy of the variable “x,” 004 stress-eating fried chicken, and 006 offering increasingly unhelpful battlefield solutions.
When 032 inevitably hacks into the teacher’s computer to grab the test answers, it’s up to 002 to remind them that not every battle is won by cheating.
In the end, the Numbers may not understand math — but they do understand standing beside each other. Even if the real enemy is algebra.
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- Language:
- English
- Words:
- 960
- Chapters:
- 1/1
- Hits:
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The Mercenary is a Reader! (Teen Merc x ORV) by Art_is_Truth
Fandoms: 전지적 독자 시점 - 싱숑 | Omniscient Reader - Sing-Shong, 입학용병 | Teenage Mercenary (Webcomic)
21 Feb 2026
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This is my first fanfic. Please do read and criticize. My sister asked me to make this, but it's my first time writing a story.
-Crossover between ORV and Teen Merc.
You won't see the crossover aspect fully until later chapters. -
nowhere to stand (nowhere to hide) by macrauchenia
Fandoms: 입학용병 | Teenage Mercenary (Webcomic)
16 Feb 2026
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Ever since his return to Korea, the lives of Ijin Yu and 001 have mostly run parallel to one another. There have been periodic intersections – instances where 001 needed to step in to protect what’s important – but he’s always been able to maintain that careful boundary.
His friends at school, Dayeon, Grandpa – they all belong to the safer, gentler world of Ijin Yu. The dangers are different: low-end gangsters and high school bullies and the occasional threat to the SW Corporation. It’s not a world where he’s supposed to lose people.
When someone close to Ijin is targeted by assassins, he struggles to find the balance between being a normal teenager and being 001, trained mercenary.
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[Alternatively, Yeona receives threatening letters, Ijin hates hiding the truth, and Seokju gets dragged into the worst vacation ever. Oh, and the Numbers decide to get involved.]
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When the government won't leave you alone. by Elijin9566
Fandoms: 입학용병 | Teenage Mercenary (Webcomic)
13 Feb 2026
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Ijin gets kidnapped by the government.
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"the numbers don't get abandoned by 001 and they all end up happy. that's it. that's the fic"
-my Beta, 2024Series
- Part 1 of 8’s teenage mercenary/enrollment fics
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The Numbers are working for SW! What could possibly go wrong?
Updates will be random
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How could one old book full of memories and longing cause friction between two cyborgs' new relationship?
- Language:
- English
- Words:
- 4,940
- Chapters:
- 2/2
- Hits:
- 53
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The struggles of a protective big brother by FlameWind
Fandoms: 입학용병 | Teenage Mercenary (Webcomic)
14 Jan 2026
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002 refused to admit how much his stomach clenched, especially when Alice spoke on the other end of the line. He instinctively readied himself for the worst news possible about 008 (it wasn’t unheard to have a collapse soon after a stabilizing operation), but Alice words took him by surprise.
“Get your ass back here, now!” Her voice sounded frantic but slightly muffled, as if she didn’t want to be heard. “It’s Ijin, he is… there is something wrong with him!”
002 felt a chill running down his spine. -
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"Sometimes I wonder what I look like in your eyes."
"And sometimes I wonder how you can hate something so perfect."
. ݁₊ ⊹ . ݁˖ . ๋࣭݁ ⭑⚝๋࣭ ⭑. ݁₊ ⊹ . ݁˖ . ݁
In which Four, a former experiment in the Hawkins lab, finally returns to Hawkins after a long time with the desperate need to get revenge on the very people who hurt her, only to find out that the lab had been destroyed a long time ago.
What will happen if she stays? What will happen if she meets a certain someone who changes her perspective on her abilities? Only time will tell.
. ݁₊ ⊹ . ݁˖ . ๋࣭݁ ⭑⚝๋࣭ ⭑. ݁₊ ⊹ . ݁˖ . ݁
Warnings will be added throughout the chapters as the book progresses since I do not have a complete plan on how the chapters will lay out and I'm winging it with a vague idea. Updates are slow since I suffer from chronic writer's block and rewrite my sentence every other word, but I will try my best to post frequently as season five progresses (when I started the first rough draft, it was the middle of 2025)
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Shopping Trip by Elijin9566 for skeletonqueen06
Fandoms: 입학용병 | Teenage Mercenary (Webcomic)
03 Jan 2026
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This is a rewrite of my other work, so nothing original. Anyway, same as before, thank you to skeletonqueen06 on Tumblr for the idea, and I hope you enjoy this much better adaptation of the concept. Much love.
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A New Life. by Elijin9566
Fandoms: 입학용병 | Teenage Mercenary (Webcomic), 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
11 Dec 2025
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Ijin/001 in UA high school!
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- Part 2 of Numbers and Quirks
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Celine was as normal as a terminally ill girl could get. She had loving parents, although her mom yelled at her a lot for things that was out of their control, her father died in the war, and then the cherry on top. Her mother sells her to Black Ghost. From there an adventure she could only dream of begins. She just has to prove to everyone that she can be trusted.
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001 and 032 get turned into toddlers, and now the Numbers have to take care of them until the effect wears off.
Also many thanks to my friend @high-pressure-washing-machine for helping with the writing of the mission.
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Celia is a deadly mercenary — fierce, proud, and unbreakable.
When her unit is wiped out and she’s captured by a secret paramilitary group, she comes face to face with Mad Dog — a brutal, scarred commander who trained child soldiers and rules through fear.But Celia isn’t afraid.
Maybe she’s just reckless enough... to make him see her not as a prisoner, but as his next asset for the Camp.--------
This story takes place in the universe of the webtoon Teenage Mercenary (Mercenary Enrollment), but you don't need to have read it to enjoy or understand this fiction.
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Forest's best team has to stay with the Numbers; let's see how this ends.
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The SW team gets special training from some special guests...
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renegade /ˈrenəˌɡād/
(n) [a person who deserts and betrays an organization, country, or set of principles]in which a girl who escapes the camp has to overcome the new difficulties of society while dealing with the traumas of her past from living in grian.
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Some Whumptober prompts, once again, mostly Ijin and the Numbers, cause I find them very funny. Maybe some obscure AUs, too.
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Lo que dejamos atras volviendo a nosotros. by Vk_Lily05
Fandoms: 입학용병 | Teenage Mercenary (Webcomic)
29 Sep 2025
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Ijin Escapo del campamento, teniendo el nuevo comienzo en la Aldea y haciendo su vida ahí, sin embargo al pasar de un año, El campamento busca invadir la preciada Aldea y toda su tranquilidad se esfuma.
Omegaverse.