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  1. Iruma-Kun From Danville to Demon World by

    Fandoms: Phineas and Ferb, 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)  

    08 Sep 2025

    Tags
    Summary

    Due to an incident in Japan, Iruma had been forced to spend a majority of his life in the area around an odd city known as Danville.

     

    It was.... well honestly he actually found himself enjoying the people there far more than his own parents.

     

    He even made friends with some nice kids over the summer, and found mentorship in a nice evil scientist and his platypus nemesis.

     

    But all good things had to come to an end, and his parents sold his soul for money.

     

    To bad for everyone you can take a boy out of Danville but you can't take the Danville out of the boy.

    Language:
    English
    Words:
    10,482
    Chapters:
    7/?
    Comments:
    22
    Kudos:
    89
    Bookmarks:
    28
    Hits:
    1,536

  2. A demonic fairytale by

    Fandoms: 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Manga)  

    08 Sep 2025

    Tags
    Summary

    Iruma learns that in the case of a Demon king's death, the kings spouse takes over until a new king is chosen.
    As a good leader he wants to give the demons an extra layer of protection so the Netherworlds doesn't succumb to chaos like it did after Delkira's disappearance.
    The issue? Iruma has never been in love before.

    Language:
    English
    Words:
    32,687
    Chapters:
    9/?
    Comments:
    65
    Kudos:
    348
    Bookmarks:
    44
    Hits:
    6,950

  3. Impure Evil by

    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)  

    07 Sep 2025

    Tags
    Summary

    What was going through people's heads when Iruma went through his evil cycle? Let's take a closer look, shall we?

    Language:
    English
    Words:
    3,094
    Chapters:
    3/?
    Comments:
    52
    Kudos:
    1,066
    Bookmarks:
    113
    Hits:
    10,389

  4. Half Demon by

    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)  

    06 Sep 2025

    Tags
    Summary

    “I’m pregnant.”

    The words were like a spear through the chest. “What?”

    “I’m carrying a demon child.”

    Kalego sat up, head spinning. “That shouldn’t be possible.” They were entirely different species after all.

    “And yet, it is.”

    Or: Iruma’s mom summoned Kalego as her familiar first and Iruma is Kalego’s son—a half-human, half-demon cambion. 15 years later and Kalego never thought he’d get the chance to meet him until a certain blue haired boy gave a speech at the Babyls opening ceremony.

    Series
    Language:
    English
    Words:
    30,938
    Chapters:
    17/?
    Comments:
    279
    Kudos:
    1,219
    Bookmarks:
    286
    Hits:
    27,287

  5. The Dark Angel Reveal by

    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)  

    06 Sep 2025

    Tags
    Summary

    Iruma Suzuki is the son of a demon and an angel. At the deviculum he decides to have some fun.

    Language:
    English
    Words:
    878
    Chapters:
    3/3
    Comments:
    7
    Kudos:
    130
    Bookmarks:
    19
    Hits:
    2,255

  6. Of Death and Hope by

    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), Warhammer 40.000  

    05 Sep 2025

    Tags
    Summary

    A member of the Death Korps of Krieg is suddenly transported to the netherworld, where he meets Asmodeus and Clara, and slowly tries to come to grips, both with his new reality, and himself.

    Language:
    English
    Words:
    27,067
    Chapters:
    13/?
    Comments:
    19
    Kudos:
    38
    Bookmarks:
    8
    Hits:
    1,200

  7. Fuck It by

    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)  

    04 Sep 2025

    Tags
    Summary

    Once the youngest Demon King, Iruma Suzuki suddenly awakens in his fourteen year-old body at Sullivan Manor, memories of his reign lost. The only clue—a cryptic voice from his ring, Alikred, who hides a darker identity. As Iruma’s mana twists into something unfamiliar, he realizes: the past is changing, and he’s at the center of the mystery.

    Warning: NO BETA READER. Sorry for any misspelling as it’s a one person operation:/

    Short chapter, approximately 780 words per page. Can be more or less depending on my mood.

    Language:
    English
    Words:
    6,125
    Chapters:
    7/50
    Comments:
    19
    Kudos:
    97
    Bookmarks:
    10
    Hits:
    1,212

  8. Донечка для Цербера by

    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)  

    31 Aug 2025

    Tags
    Summary

    Уявимо, що було б, якби Ірума продали Кальєго, а не до лорда Саллівана через своїх родичів, що захотіли собі спадщину і заразом позбутися "білої ворони" сім'ї. Але ніхто не знав, що в гонитві за грошима вони з'єднають справжню сім'ю
    ~✵~✵~✵~✵~✵~✵~✵~✵~✵~✵~✵~✵~✵~
    Або історія про те, як сторожовий пес виховував людську дівчинку і виявився з нею зв'язаний, тож прийняв як доньку та хоче, щоб вона стала наступним сторожовим псом школи. Але з цього часу вийде ціла пригода

    Language:
    Українська
    Words:
    34,744
    Chapters:
    14/?
    Comments:
    5
    Kudos:
    48
    Bookmarks:
    5
    Hits:
    1,725

  9. Cerberus by

    Fandoms: 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Manga)  

    31 Aug 2025

    Tags
    Summary

    Iruma Suzuki is not stressed, not angry, and not pissed of course!!! Hes not blowing up that pretty much his classes vacation is going all wrong. Everything is totally fine he is also totally not mana malnourished.

    Or

    Happy fun times and Iruma gets more family :3 ALSO CHAOS

    Language:
    English
    Words:
    2,203
    Chapters:
    3/?
    Comments:
    15
    Kudos:
    42
    Bookmarks:
    7
    Hits:
    631

  10. My Father and Myself <3 by

    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)  

    31 Aug 2025

    Tags
    Summary

    Before the end of the term, Kalego assigns one last task. This task consists of writing a short story from personal experiences whether big or small. He honestly thought he was going to get some cringy stories from the kids about how their parents used to sing them songs or take them out to the amusement park when they were younger. He also believed most of them would be made up. Yet one submission made him question the sanity of one of his students….

    Language:
    English
    Words:
    61,512
    Chapters:
    7/?
    Comments:
    68
    Kudos:
    332
    Bookmarks:
    49
    Hits:
    4,531

  11. Welcome to Demon School: Iruma & Y/N ~☆ by

    Fandoms: 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Manga)  

    26 Aug 2025

    Tags
    Summary

    Featuring Iruma's 'twin' - Y/N

    Language:
    English
    Words:
    4,704
    Chapters:
    1/1
    Kudos:
    6
    Hits:
    79

  12. Role of a Guard Dog by

    Fandoms: 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Manga)  

    24 Aug 2025

    Tags
    Summary

    Naberius Kalego just wanted a peaceful break before he had to go teach his very abnormal class… Then Iruma appeared.

    Next thing he knew, everything seemed groggy and was blacking out.

    Then he woke up without any idea who he was, except that he was a blue-haired boy’s familiar.

    ———

    Or: an amnesia fic with our favourite demon teacher as the victim

    Language:
    English
    Words:
    9,620
    Chapters:
    7/?
    Comments:
    41
    Kudos:
    155
    Bookmarks:
    21
    Hits:
    2,462

  13. To Have and To Hold From This Day forward! by for Xero_0

    Fandoms: Ao no Exorcist | Blue Exorcist, 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)  

    23 Aug 2025

    Tags
    Summary

    To think that decades of hard work, of countless sacrifices, all done in the name of unity, could be undone in just a single night; and by a group of exwires- teenagers, no less.

    No matter. Lucifer is more than willing to pick up the pieces. This wasn't a loss per se. No, not in the grand scheme of things. It was all just a small hiccup, and the fallen prince had spent far too many centuries- nay- milennia for his operations to fail.

    All that needs to be done now was a simple change of strategies. With the pieces now in place, the king of light makes his move to dispose of the True Cross Order's most precious Knight...

    Through marriage?!

    Language:
    English
    Words:
    28,187
    Chapters:
    5/?
    Comments:
    104
    Kudos:
    246
    Bookmarks:
    51
    Hits:
    3,580

  14. A matter of time by

    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 Aug 2025

    Tags
    Summary

    Did you forgot to do the one simple thing you had to do for your batra?

    Worry not!

    You only need a prohibited spell, some time traveling, trying to avoid everyone you know and failing within five minute and-

    Wait, what was the question?

    Language:
    English
    Words:
    18,447
    Chapters:
    1/1
    Comments:
    3
    Kudos:
    10
    Bookmarks:
    2
    Hits:
    156

  15. ¡¡¿¿Una Humana en un mundo de demonios??!! ¡¡¡¿¿Qué??!!! by

    Fandoms: 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Manga), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga)  

    22 Aug 2025

    Tags
    Summary

    Zenitsu parpadeo lentamente. Miro a su alrededor pero se centro en otra cosa, algo frente a ella.

    Series
    Language:
    Español
    Words:
    14,439
    Chapters:
    9/20
    Kudos:
    24
    Bookmarks:
    2
    Hits:
    572

  16. Grounded...?(hiatus) by

    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 Aug 2025

    Tags
    Summary

    What if Ali didn't have enough time to save iruma but would it even cover everything...

    What if iruma was an (ðəmøŋ) human and he was scared he might get eaten

    Who is iruma's real father..?

    Language:
    English
    Words:
    2,269
    Chapters:
    3/?
    Comments:
    29
    Kudos:
    175
    Bookmarks:
    35
    Hits:
    3,081

  17. Greedy Summons by

    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)  

    17 Aug 2025

    Tags
    Summary

    I'll update tags was I post more

    What if, Instead of Sullivan, it was Andro M. Rock (let's just say this was an accident) that had been summoned by Iruma's parents?

    Rock's greed leads him to take the deal but now reality has set in. He has to do something.

    Because Demon Border Patrol will come after him. And, while a greedy bastard, he still needed to protect his little brother. And now this human as well.

    Language:
    English
    Words:
    2,085
    Chapters:
    2/?
    Comments:
    11
    Kudos:
    85
    Bookmarks:
    12
    Hits:
    493

  18. omega troubles by

    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)  

    13 Aug 2025

    Tags
    Summary

    Kalego is not your average omega but goes into an early heat but with his partner away on a field trip no one is left to help.
    Thats where Asmodeus comes in.

    (not in a sexual way.)

    If an omega goes into a heat their are 2 things that can help them:
    To mate sexually with a partner or bond with a kit/parent in a parental way

    Read notes for more info on this au.

    Language:
    English
    Words:
    2,175
    Chapters:
    2/2
    Comments:
    9
    Kudos:
    48
    Bookmarks:
    4
    Hits:
    298

  19. Bluejay and the Bats by

    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), Batman - All Media Types  

    12 Aug 2025

    Tags
    Summary

    Bruce rarely goes on work trips, as Bruce Wayne. But as Batman he goes on plenty. So when a work trip came up to go to Japan he thought he would skip out on this one like he did all the others, but something felt like it was calling to him. So he did something out of character and went. It was a trip to check up on the Japanese branch of Wayne Enterprises. Bruce has been to Japan before, it was as Batman so he had to act like he’s never been here. So to keep up appearances Bruce wandered around to the city, soon coming up to one of many forests in the area. It was there he saw something out of the ordinary, a blue haired child that couldn’t be more than 6.

    The Child's name is Iruma.

    (An AU where Iruma Suzuki is raised by Bruce Wayne at a young age and as the youngest child. Thus, changing multiple things.

    I'm still bad at summaries.)

    Series
    Language:
    English
    Words:
    8,850
    Chapters:
    5/?
    Comments:
    11
    Kudos:
    139
    Bookmarks:
    39
    Hits:
    2,178

  20. Punish by Anonymous

    Fandoms: 魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Manga)  

    09 Aug 2025

    Tags
    Summary

    Against his better judgement, Iruma agrees to meet with Kirio after not having seen him since Deviculum. During their encounter, Iruma is assaulted in a way he has never been before.

    Luckily(?), Purson Soi was there to witness the whole thing.

    Language:
    English
    Words:
    22,272
    Chapters:
    7/10
    Collections:
    1
    Comments:
    23
    Kudos:
    228
    Bookmarks:
    16
    Hits:
    3,908

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