OmegaMuffin
Fandoms
Recent works
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Melting Under Your Fire (and the Sun) by OmegaMuffin
Fandoms: 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime & Manga)
08 Jul 2026
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Summary
Summer was nothing short of a nightmare to someone like Giyuu, whose body didn’t seem to care for extreme temperatures on either end.
With the ever demanding nature of their job, the toll the heat takes on his body brought exhaustion to the surface in a way he couldn’t fight against.
At least Kyoujurou was by his side to look after him. Even if his sunny disposition under the same conditions made Giyuu’s head spin with envy and infatuation.
Or maybe it was just the heat talking.
Day 5 of RenGiyuu Week! Hot Days/Dawn.
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To Call You Mine, I’d Wait Forever by OmegaMuffin
Fandoms: 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime & Manga)
07 Jul 2026
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Summary
In order to keep Giyuu’s peace of mind and wellbeing safe, both he and Kyoujurou agreed to keep their relationship a secret. With the Kamado’s trial having exposed Giyuu’s true dynamic and along with it, their hidden relationship, it brought the realization that they were free to act how they pleased.
Everyone knew, so however they chose to move forward was up to them.
Kyoujurou was more than thrilled to act upon an idea he’d been sitting on for months at that point. The only question? How to proceed.
All he knew was that he wanted the world to know just how deep his love for Giyuu ran with his limitations gone.
Day 2 of RenGiyuu Week 2026! Devotion/Freedom.
Series
- Part 4 of A/B/O Chronicles of Water and Flame
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To Soothe a Wounded Heart by OmegaMuffin
Fandoms: 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime & Manga)
01 Jul 2026
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Summary
To Giyuu, someone who nobody seems to expect anything of, it’s quite the curious observation to never see someone waver under the weight of duty. Even the strongest have their limits after all.
He’s noticed the tells within all of his coworkers overtime, yet here Kyoujurou is, unchanging as ever.
At least, until Giyuu is the one to offer a shoulder to lean on.
And how could Kyoujurou refuse when he’s never had the opportunity before?
Day 1 of RenGiyuu Week 2026! First Impressions/Opposites.
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Echos of the Heart by OmegaMuffin
Fandoms: 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga)
14 Feb 2026
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Summary
Giyuu and Kyoujurou are a few months into their relationship, but have decided to keep it a secret from nearly everyone else. That is, until Tengen notices something very strange between the two of them at the latest Hashira meeting. He’s determined to find out the cause.
Or Tengen watches how disgustingly fluffy and sweet rengiyuu are with each other. Yknow, the usual.
Happy Valentine’s Day! ❤️💙
Series
- Part 3 of A/B/O Chronicles of Water and Flame
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The Joys of Reunion (and Ire of Certain Bystanders) by OmegaMuffin
Fandoms: 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga)
14 Aug 2025
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Summary
On his way home from a long mission away, Giyuu is called into a Hashira meeting with his comrades. What was once an uneventful and rather lonely experience has now turned into a warm, lively bonding session with those he considers part of his new family. Mitsuri is wonderfully sweet and kind, Muichirou’s constantly demanding his attention, Shinobu loves to get under his skin as always, then he reunites with his loving mate to make it all perfect.
Orrrr I just wanted to write some cheesy ass fic where rengiyuu have a super romantic cliche reunion after time apart, but it turned into a really wholesome bonding fic between Giyuu and those who love him before that <3
Series
- Part 2 of A/B/O Chronicles of Water and Flame
Recent series
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A/B/O Chronicles of Water and Flame by OmegaMuffin
Fandom 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime & Manga), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga)
07 Jul 2026
Summary
A series of fics in non-chronological order depending on what mood I’m in to write. All dealing with rengiyuu in my omegaverse au!
I have a lot of ideas and some stuff planned but I’m very inconsistent with writing, full disclosure. I’ll do my best to deliver tho! We need more of them in every universe.
- Words:
- 48,590
- Works:
- 4
- Bookmarks:
- 60