1 - 20 of 215 Works in Lord Sullivan & Suzuki Iruma

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  1. Born Grounded 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)  

    10 Dec 2025

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    Summary

    A grounding fic with lots of highs and lows. The teachers will get some insight into Iruma's life and this will cause a domino effect. It's doesn't really resemble the original story anymore. Update: Next chapter all Misfits and all teachers will know Iruma is human. The parental tags are really going to come into play soon.

    Language:
    English
    Words:
    28,457
    Chapters:
    23/?
    Comments:
    127
    Kudos:
    622
    Bookmarks:
    125
    Hits:
    22,014

  2. Life outside security 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 Dec 2025

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    Summary

    Opera knew they felt off. So they went to see what was wrong, when they were hit with it. They were pregnant.

    And not only that, they were put on leave from being a security devil.

    So, while they waited for their child to come, they had to find out how to live outside of their usual work as a bodyguard.

    Or

    Opera becomes bored trying to figure out how to live like a normal person

    Language:
    English
    Words:
    6,806
    Chapters:
    6/?
    Kudos:
    5
    Hits:
    78

  3. Rotting flowers by

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

    06 Dec 2025

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    Summary

    Flowers take a while to bloom, once they’re the beautiful colours and shapes they are easy to neglect and damage that beauty.

    Iruma Suzuki, 15 years old, has spent his whole life figuring out things himself. He doesn’t need help, that’s pathetic.

    But maybe the darkness has different ideas, maybe that guilt, that horror is shoved into a jar. But that jar has cracks and a loose lid, allowing the very thing that breaks Iruma. The thing that causes his flower to wilt and crumble.

    NO SHIPS.
    OC IS MAINLY FOR PLOT.

    Language:
    English
    Words:
    6,932
    Chapters:
    10/?
    Comments:
    26
    Kudos:
    81
    Bookmarks:
    12
    Hits:
    1,654

  4. The Start 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)  

    05 Dec 2025

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    Summary

    What if Iruma is Delkira's son??

    Series
    Language:
    English
    Words:
    3,878
    Chapters:
    5/?
    Comments:
    10
    Kudos:
    92
    Bookmarks:
    17
    Hits:
    1,599

  5. One Sister Changes Everything 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)  

    29 Nov 2025

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    Summary

    I gave up on one story with my OC Lisa, but I want to try again. I love the characters and world of this serious but I want to change several things. Iruma needs a personality opposite sister! She's an angry, headstrong, ladder-climber, with strong ambitions, magic powers but similarly ugly past.

    Language:
    English
    Words:
    4,986
    Chapters:
    5/5
    Kudos:
    11
    Bookmarks:
    1
    Hits:
    338

  6. 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)  

    27 Nov 2025

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    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

    Series
    Language:
    Українська
    Words:
    62,748
    Chapters:
    23/?
    Comments:
    18
    Kudos:
    70
    Bookmarks:
    7
    Hits:
    2,734

  7. The missing ̷D̷e̷m̷o̷n̷ ̷k̷i̷n̷g̷ misfit 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)  

    25 Nov 2025

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    Summary

    A day ago, he was in usual spots. The Royal one, the second-year tower, the cafeteria, the Magical Tools Research Battler room, the spare room for the student council, the courtyard… then he was back home.

    The day was filled with usual activities. Settling little squabbles among his soulmates. Talking to classmates. Smelling the flowers. Cleaning up the Battler room. Theatrically reading manga pages. Eating lots.

    … Saying good night, and adding, “I’ll see you tomorrow,”

    Iruma holds many demons dear to him. He’s forged many friendships, made many promises, and set ambitious goals. He loves everyone, and in turn, is beloved.

    So, by all means, it doesn’t make sense…

    When he disappears without a trace.

     

    TLDR: What happens if Iruma pulls a Derkila?

    Language:
    English
    Words:
    9,963
    Chapters:
    4/13
    Comments:
    28
    Kudos:
    100
    Bookmarks:
    19
    Hits:
    1,242

  8. Welcome to the demon princes by

    Fandoms: Danny Phantom, 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)  

    20 Nov 2025

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    Summary

    Danny and Iruma are adopted by the demon lord Sullivan, now enrolled at the prestigious demon school Bablys, they will learn to live in the netherworld

    Language:
    English
    Words:
    128
    Chapters:
    1/?
    Comments:
    2
    Kudos:
    136
    Bookmarks:
    50
    Hits:
    1,901

  9. El hijo del rey demonio by

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

    19 Nov 2025

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    Summary

    El legendario Rey Demonio Delkira desapareció sin dejar rastro, dejando atrás un trono vacío y un reino que aún lo espera.
    Nadie sabe que su viaje lo llevó más allá del Reino Demoníaco… hasta el mundo humano.

    Allí, entre miseria y abandono, encuentra a un pequeño niño vendido por sus propios padres: Iruma Suzuki.
    Un niño frágil, temeroso… y con una pureza que ningún demonio había visto jamás.

    Conmovido por su inocencia, Delkira rompe las leyes de ambos mundos y lo lleva consigo, jurando protegerlo.
    Sin embargo, el antiguo rey no desea regresar a su trono, así que decide ocultarse junto al niño, criándolo en secreto bajo otra identidad.

    Pero los lazos de sangre y destino no pueden esconderse para siempre.
    Porque algún día, el mundo demoníaco descubrirá la verdad:
    el heredero del Rey Demonio ha llegado… y es humano.

    Language:
    Español
    Words:
    15,442
    Chapters:
    6/?
    Comments:
    22
    Kudos:
    87
    Bookmarks:
    11
    Hits:
    935

  10. A Demon's Observational Manual: How To Raise A Classmate Who Turned Into A Baby by

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

    03 Nov 2025

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    Summary

    Kalego may have many things on his plate, but he does not know how to deal with this particular matter. The true mischievous beings that render the adults with headaches and trauma. Just look at how the creature stares at him and wonders what his next move will be.

    "I will not bow down to you. Besides after tonight, you will be someone's problem to deal with." The being let out a little laugh as Kalego eyebrow twitched at the sound.

    "ah!"

    "How dare you mock me! Don't forget who I am!"

    "Um...Kalego-kun, you do realize Iruma doesn't understand a thing you are saying? I am surprised at how he isn't afraid of us," Balam-sensei holds a strange object as it rattles to the baby who cries in awe.

    "How did I ever get put in charge of this?" Ignoring the infant who plays with Balam-sensei as he plays with him carefully.

    Language:
    English
    Words:
    62,627
    Chapters:
    20/?
    Collections:
    1
    Comments:
    509
    Kudos:
    3,244
    Bookmarks:
    541
    Hits:
    74,608

  11. Asylum - TEMPORARY 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 Oct 2025

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    Summary

    "Iruma remembered turning the corner to reach the Royal One, when a voice he hadn't heard in months came from behind him. "Iruma-chan~" His skin crawled. Iruma recognized that voice. He hadn't heard it since the Heartbreaker event. Iruma turned around and what he saw confirmed his doubts: Atori, the teacher who had gone mad during Heartbreaker and attacked some students and other teachers, was standing there as if nothing had happened. A creepy wide smile on his face, the demon was looking at him slyly "How long! How about a reunion with your teacher?" Atori asked mockingly"

    Basically Iruma is kidnapped by the Six Fingers and they try to convince him that he is a patient in a psychiatric clinic.

    Language:
    English
    Words:
    10,081
    Chapters:
    5/6
    Comments:
    39
    Kudos:
    75
    Bookmarks:
    9
    Hits:
    1,448

  12. Curse of Binding 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 Oct 2025

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    Summary

    Iruma hasn’t been in the netherworld for long but he has picked up a few things ever since his grandfather took him in. He knows that there is a hierarchy between demons and their ranks, the higher you are the more powerful you are. He also has learned how demons have adapted and evolved over time, and more importantly, he learned how much demons value their wings. To be a demon with no wings is not a demon. To be bound to the ground and never soar to new heights might as well be a death sentence; and Suzuki Iruma, 14 years old, the grandson of one of The Three Greats, is a human.

    He lacks the one thing that makes a demon.

    So when Iruma stands in front of his teachers, with his back exposed to the cool air in the room he fears for his life . He feels the dread inside himself well up and feels isolated as he is being gawked at. He is not one of them, and never will.

    To be bound to the ground is a curse, a weight that will always press down on Iruma's conscience. It's a reminder of his limitations in a world that prizes strength and freedom above all else and he will never truly fit in.

    --

    Or: typical grounding au in which the babyls staff finds out about Iruma and his lack of wings.

    Language:
    English
    Words:
    11,220
    Chapters:
    6/?
    Comments:
    64
    Kudos:
    807
    Bookmarks:
    166
    Hits:
    11,271

  13. Cerberus by

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

    18 Oct 2025

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    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

    ATTENTION: IS CURRENTLY ON A KINDA SHORTISH HIATUS AUTHOR IS SO FRICKEN BUSY *Insert crying*

    Language:
    English
    Words:
    5,173
    Chapters:
    8/?
    Comments:
    31
    Kudos:
    128
    Bookmarks:
    25
    Hits:
    2,867

  14. Counting heartbeats 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)  

    15 Oct 2025

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    Summary

    "58... 59... 60. Opera's feline ears twitched. 56... 57... 58... 59... 60. Yes, the count was perfect. Not one more, unfortunately. Opera looked at Iruma, who was telling Sullivan what he had done that day in Babyls and the games he had played with Asmodeus and Clara. 'Only 60 heartbeats' Opera mentally noted, perfectly hiding their concern behind the perpetually neutral expressions on their face"

    Basically Opera monitors Iruma's heartbeat and notices differences with the hearts of demons.

    Series
    Language:
    English
    Words:
    1,981
    Chapters:
    1/1
    Comments:
    33
    Kudos:
    184
    Bookmarks:
    22
    Hits:
    1,154

  15. Welcome to Parenthood Opera 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)  

    15 Oct 2025

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    Summary

    Sullivan was contemplating kidnapping a grandchild for himself when his friends said something that made him change plans.
    “The best part about having a grand child is being able to return them to their parents at the end of the day," said Levi.
    “Yes. I can spoil my grandson all I want and not worry about a thing.”
    “So much nicer when I don’t have to be the disciplinarian.”

    Containing my fan-theory about Opera's backstory

    Language:
    English
    Words:
    6,252
    Chapters:
    3/?
    Comments:
    3
    Kudos:
    69
    Bookmarks:
    9
    Hits:
    788

  16. my heart beats the same by for Crazy_Cockatoo

    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)  

    14 Oct 2025

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    Summary

    When Henri woke up that morning and headed out to work, he hadn’t expected the day to be so full.

    Language:
    English
    Words:
    3,172
    Chapters:
    1/2
    Comments:
    15
    Kudos:
    67
    Bookmarks:
    10
    Hits:
    471

  17. Something Unexpected 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 Oct 2025

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    Summary

    Suzuki Iruma has never said 'no.' Not once. He was possibly the biggest pushover in the world. From shady proposals to outright illegal deals he'd yet to find anything he would decline. No matter how badly he wanted to. It's pathetic, really. Even he knows that. So when his parents– so kind, so polite– asked him if he could please finish a summoning circle for them, he walked into their basement without hesitation.

    One glance at the word ‘demon’ and Iruma wishes he was illiterate.

    or

    alternate timeline where Iruma summons Sullivan and, much like anything he does, things don't go to plan.

    Series
    Language:
    English
    Words:
    121,882
    Chapters:
    24/?
    Comments:
    771
    Kudos:
    1,438
    Bookmarks:
    404
    Hits:
    39,070

  18. Demon or human? Both!? by

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

    05 Oct 2025

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    Summary

    What if Iruma was the demon king's son but he left him in the human world for his safety. what if Iruma knew his father was a demon and mother a human. Read and find out.

    TW!!!

    Experimentation
    Mental issues
    Abused
    Trauma
    Depression
    Trust issues

    Language:
    English
    Words:
    4,755
    Chapters:
    4/?
    Comments:
    13
    Kudos:
    323
    Bookmarks:
    47
    Hits:
    4,838

  19. Soldier Boy 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 Sep 2025

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    Summary

    Was he really back in he forest or was he just dreaming. Is it really a goal if it's to be with others. Why does it itch so bad, it hurts so bad

     

    scratching at his skin as his mind spiraled and twisted his own thoughts and words, he couldn't help himself as he was only a victim to a cruel game he knew too well at. 

    A hot red liquid would only drop drop and drop, hitting the pieces of fabric and the surrounding skin itself, he would only notice later on

     

    OR :

    Iruma's strong years of neglect and labour will finally catch up to him and bring him down!! 

     

     

    Language:
    English
    Words:
    1,201
    Chapters:
    1/3
    Comments:
    6
    Kudos:
    50
    Bookmarks:
    9
    Hits:
    585

  20. Alice Teaches Iruma Magic: Good Idea? by

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

    21 Sep 2025

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    Summary

    "Master Iruma!" Alice ran up to Iruma his arms going every which way because of this splendid idea.

    "Yes?" Iruma answered.

    "Let's have a sleepover at my house just the two of us and Oh! I can teach you all of the magic I know!"

    ------------------------------

    THIS WILL GO GREAT XD

    Language:
    English
    Words:
    1,443
    Chapters:
    1/1
    Kudos:
    10
    Bookmarks:
    2
    Hits:
    202

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