Fics like My new dad is an irresponsible idiot (but I still love him)

It wasn't Sullivan who got summoned and adopted Iruma, but the missing demon king Derkila who was vacationing in the human world. The irresponsible king is smitten by the human boy and claims him as his own. Why? Hell knows what's going on in that head of his... He wants to show this precious boy to the whole netherworld. His boy. His alone. Naggy Sully could cry him a river over how jealous he was. Who will win and influence the other more in the end? The pushover or the lazy king?

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1. Li p’ti éfant avou l' pâpa ; How a demon lord adopted a human child. by Coton_De_Loup (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))
2. Welcome to the Demon World! Iruma-kun by Shashaori (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))
3. Grounded by FollowtheLeider (魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Manga))
4. pawprints by thewunderkind (魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Manga))
5. Are You Serious? Right In Front Of My Trumpet??? by WyvernQuill (魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Manga))
6. Kiss, kiss, maybe in love? by ClairetheSadisticWriter (魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Manga))
7. Forever Grounded by Demi_Chaos (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))
8. Flightless by Sleepycoffeeaddict13 (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))
9. Subject 017 by Ace1228 (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. Where are your wings Iruma-Kun? by Lulabell13 (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. Curse of Binding by adotdamilton (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))
12. Come Back to the Demon World, Iruma-kun! by Catslucy, coolsoup107 (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. law of insomnia by thewunderkind (魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Manga))
14. The Atrocities That Befell One (1) Suzuki Iruma by A_Hallucination (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. The Ground We Walk On. by GarnetJPH (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))
16. just a bite (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. Born Grounded by Sounny (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), more)
18. Iruma, the Super Hero/Villain-Wait What? (Hiatus) by 616mcu, HAZZARD_OVERFLOW (魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Manga), DC Super Hero Girls (Cartoon 2019))
19. Please Patch this Gluttonous Void by YazziyousDaydreamer (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))
20. on things that are rather felt by jaeminjeno (魔入りました! 入間くん | Mairimashita! Iruma-kun | Welcome to Demon School! Iruma-kun (Manga))