OmegaMuffin
Fandoms
Recent works
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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
Tags
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
Tags
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
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Safety in Vulnerability by OmegaMuffin
Fandoms: 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga)
22 Jun 2025
Tags
Summary
Giyuu has been alone in life for many years, dealing with all his problems solo. But with his heat nearing, he knows that he’ll need to rely on someone for the first time in so long. The only issue is that the mere thought terrifies him.
Thankfully, his mate is a very loving and patient man, who he can trust with all of his heart. After some heart-to-heart and an exchange of honesty, Giyuu shares with him an idea to benefit them both in the long run. Kyoujurou is more than happy to go along with his beloved’s whims.
I’m still bad at summaries but I guarantee if you like the tags you’ll dig this lil treat.
Series
- Part 1 of A/B/O Chronicles of Water and Flame
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The Allure of Overcast Skies by OmegaMuffin
Fandoms: 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime)
18 Dec 2024
Tags
Summary
Kyoujurou had never been one for rainy days, but he soon finds he enjoys them just as much as any other day when he spends it with his beloved Giyuu.
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Tags
Summary
Ace and Luffy drag Sabo out to the mall after work for his birthday!
Just some standard ASL fluff :]
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), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga)
14 Feb 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:
- 43,048
- Works:
- 3
- Bookmarks:
- 49