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Wing-less by Sillystufff
Fandoms: 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Manga), 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Anime)
30 Jun 2025
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Summary
Iruma has suffered a lifetime of hardship, probably around seven of them- if you'd like to get technical. And, at fourteen years old, Iruma Suzuki believes he's about to lose that life.
After being dragged out of class by Balam-sensei, practically thrown into the teacher's lounge, and his humanity on display for a group of demons, Iruma can do nothing, but accept his untimely death.
(A retelling of chapter 63, a grounded AU)
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My Dearest Ally by kinrosolos
Fandoms: 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Manga), 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Anime)
30 Jun 2025
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Summary
If you were to ask Agares on how close he is with Gaap, he would say that “they arent that close” and that “they were just friends”.
Yet here he is, walking (or floating in this case) to Gaap’s house.
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Agaap (Agares x Gaap) fic i wrote instead of sleeping!! it is 4 am wow i really need to sleep -
The Demonic Wish by Mad_Hattie_Hatter
Fandoms: 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Manga), 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Anime)
27 Jun 2025
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“I wish… I wish to become a demon!”
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Like a Moth to Flame by ColdSeasonTypeOfTree
Fandoms: 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Manga), 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Anime)
24 Jun 2025
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Summary
Tellur wanted to live his second life with his mother peacefully on their small farm, it didn't matter all that much to him that he now had talons and wings and claws and the ability to do magic. That was cool as hell! Until he figured out the reason for his new species being that he was isekai'd into his favorite manga.
... maybe it shouldn't have taken him fourteen years to realize, but in his defense his memory's still really spotty!
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Something that he learned quickly was that his current parental figure was fond of throwing him. Literally. He would get tossed fifteen feet in the air before she would catch him again. It took 24 times before he figured out what she was looking for. As he was falling back to the ground for the 25th time wings unfurled from his back and kept him afloat.
Which was… literally the coolest thing ever.
He had wings! Real wings! They were blue on the outside, with orange feathers on the underside. They matched his moms, which she showed off as proudly as he did.
He proceeded to admire himself in a mirror for at least thirty minutes.
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Cat ‘n Mouse by TFTALWVA for Meeparino
Fandoms: 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Manga), 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Anime)
22 Jun 2025
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Summary
It’s time for the Freaklish Festival! An event in the Netherworld of dressing up and getting candy or tricking those close to you (basically Halloween in the Netherworld) and it’s set in Babyls!
The Love Trio is invited and plan to go together to have some fun and make more memories together.
But what’s with Iruma? He’s anxious, he doesn’t trust his invite, their invite but he doesn’t know why.
And unfortunately for him, he’ll find out soon enough and he’ll regret not trusting his gut for once in his life.
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What Being A Teacher Is All About by cloudshiya
Fandoms: 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Manga), 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Anime)
21 Jun 2025
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Iruma is hired as a teacher by his grandfather. It was to create an opportunity for Iruma to gain teaching experience and other learning points, that his current position in the school would not bring him. Discreetly, this was actually part of Sullivan's preparation for him to become the next Demon King. The Demon King, as who knew everyone and managed absolutely everything in the netherworld, down to even the smallest details.
“The Demon King is the netherworld itself.” Sullivan had once told Iruma. That was when Iruma came to the realisation that the Demon King was everything. Well... A teacher was another thing. Prioritising the students' safety above anything, even going as far as to sacrifice yourself, was one of the duties of being a teacher. An Evidol was another thing. Lastly, grading papers, don't get me started on that one..
Iruma-sensei is also faced with challenges as an Evidol! As much as he finds it embarrassing, refusing his students' requests seem almost impossible.
“Please, Iruma-sensei. This is really important! I need to win this! Please!" Kerori, the Evidol, Kuromu, begged.
“… Alright, alright.” Iruma gave in. In the end, not even Iruma-sensei could resist the very word, “please".
Series
- Part 1 of A Professor’s Journey
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Timid Math Teacher at Demon School by the_timekeeper01
Fandoms: 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Anime), 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Manga)
14 Jun 2025
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Summary
A timid demon man was hired on a whim to be a math teacher at Babyls demon school.
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Wanted to Stop Being Overworked at a Boarding School? Get Adopted by a Demon and End Up Being a Slightly Older Sister to a Complete Pushover of a Brother! Fun, right? by Sapphire970
Fandoms: 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Manga), 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Anime)
11 Jun 2025
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Summary
I was bored of not seeing many reader inserts for this manga/anime series, so I decided to take matters into my own hands. It is a female POV, and it's is feeding me dopamine to figure out how to write. I will be using another fic to try to keep the plot as on point as I possibly can, however I will not be plagiarizing their work.
Please check out "Welcome to Demon School, (Y/N)-chan!", they are the inspiration for my sudden urge to write. I admire the OC inserts in the story, as well as the way the author wrote the reader. Literally binge-read both parts of their works in a day because it was scrumptious.
ANYWAYS, you, our lovely reader, are an utterly overworked student at a boarding school (Details of where in the human world is left out, so you're free to use whatever location you'd like). After working on several assignments, you barely make it to bed before you pass out. But your dream isn't exactly... normal. And by that, I mean you basically sell your soul to a demon, because apparently another student broke into your dorm and was about to do who knows what to you! Now, you get to traverse the Netherworld while going to school, trying to keep both you and your new brother from getting discovered and eaten!Series
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Blooming Bloodline's by Lupas_Arainee
Fandoms: 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Manga), 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Anime)
05 Jun 2025
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Summary
Iruma uses his blood as a stand-in for Bloodline magic, or this is my first fic and am expecting it to be bad but I wanted to make it anyways
Starts at chapter 146 and then goes right off the rails -
Found Treasure by Rose_Bookworm
Fandoms: 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Manga), 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Anime)
30 May 2025
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Summary
What if Iruma is actually a demon? What if Iruma's wings were ripped out of him? What will happen next? How will the story change?
To find out you have to read the story.
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Toshokan Shisho no Nikki/Librarian's Diary by Raita_sama
Fandoms: 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Manga), 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Anime)
26 May 2025
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Summary
The 31 year old librarian at the demonic school, Babyls, is a demon who has managed to fly unnoticed throughout her career, until the new school year begins, and with it, a series of unfortunate events that will disrupt her peaceful life. There, while she struggles to stay away from trouble, she will try to remain unnoticed, as all her secrets depend on her anonymity.
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Angelus by Artpractitioner
Fandoms: 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Anime)
08 May 2025
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Summary
A celestial fell from the Heavens, and he couldn't even remember his own crimes. His name, his purpose... who was he?
"Who am I?"
Explore the Netherworld with Iruma as he navigates his new life surrounded by demons despite his own divine origins.
Can he hide his true nature forever? Can angels and demons truly live together peacefully?Series
- Part 1 of Netherworld King
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Mairimashita! Iruma-kun oneshots and various other little drabbles by Ghostie_haz_Insomnia
Fandoms: 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Anime)
29 Apr 2025
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Summary
I love the anime and wanted to try writing something for it again. So, with no further ado, here it is!
Enjoy my late night writing and me going insane over my favourite trio of teacher demons. -
Balam The Therapist by The_Creator404
Fandoms: 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Manga)
26 Apr 2025
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Summary
Balam comes to realize how messed up the Misfits are and decides to give them some therapy for their troubles.
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“The Objective but Cold Blooded Snake [?]" by Eteru_R761
Fandoms: 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Manga)
22 Apr 2025
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Summary
Coming from a family of assassins because of their ability to not be detected easily, Purson Soi was tasked to eliminate the young boss of a certain Mafia. Not willing to do so, he vents his frustration using his trusty friend, his trumpet he got from his mother. While venting out his frustrations, Soi meets a girl.
This somehow leads to him discovering some things he wished he hadn't
Series
- Part 11 of The Tales Of [13] Misfits of Babyls
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Welcome to Demon School Nanachi-Chan by Tari_and_Nyanachi
Fandoms: Made in Abyss (Anime), 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Anime), 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Manga), Made in Abyss (Manga)
23 Mar 2025
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Summary
Nanachi a lonely Narehate of the 4th Layer of the Abyss finds a book full of demon summoning rituals, they decided to try it in hope of killing their friend Mitty
Nanachi summoned Sullivan a demon desperate for a granchild and he accepts the terms they lay out. Nanachi was taken to the netherworld unaware of the life ahead
many things could be found a new family friends conclusions to past traumas and more but will Nanachi obtain this? read and find out
(also i may make mistakes with Nanachi and Opera's pronouns dont get angry at me please i struggle with that stuff)
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Write Your Wish by TiggyV
Fandoms: 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Manga), 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Anime), Scribblenauts (Video Games)
19 Mar 2025
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Summary
A lot happens on Iruma's first day of school. He makes new friends, meets a few teachers, wins a notebook in a small challenge a teacher prepared, and he finds out what class he's in!
It's an exciting ride, and from there, Iruma has what he needs to start building a small support system, the first one he has ever had. It should only be small though, it's not like he's super-duper likeable. Right? Right??
Series
- Part 1 of Various AUs
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How To (Not) Raise Your (Human) Demon Teen! by Meruruko
Fandoms: 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Manga), 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Anime)
28 Feb 2025
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Summary
(I'm terrible at thesd things ok)
Opera and Sullivan day-to-day with Iruma, Opera doesn't know how to deal very well with a kid -less with a TEENAGER- and Sullivan doesn't know how to treat a 14-year-old boy who isn't his student but his grandson -even tho Sullivan put himself in this situation-, this is a book of how these too adults try their best to make of Iruma a decent person
**in this AU, Iruma is slightly more rude than in the series but he's still our cinnamon roll lol
**none of the characters are mine, they're from Mairimashita! Iruma-kun -
The Demon Kings Treasure! by ZBLITZ
Fandoms: 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Manga)
22 Feb 2025
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Summary
Kalego and Shichiro seem to have both concluded that a certain troublesome student has become their responsibility. Not only that they both start to discover something between them they have been avoiding for years. It is usually never spoken about but they both can feel it and don't want to face the truth
(Dadlego and Papa Shi)
⚠️WARNING: MENTIONS OF CHILD ABUSE ⚠️
READ AT YOUR OWN RISK
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Welcome my Flower by Pauma
Fandoms: 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Manga), 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Anime)
05 Feb 2025
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Summary
-Prologue-
We always wanted a story to end with a happy ending, a story where the main character found happiness. This is a story where a boy named Iruma has a happy ending, the only happy ending deserving for him. But to those around him, they plead for it to not be the end.