18 Works by cosmicarp
Listing Works
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A wedding brings Rei and Shuuichi back together after years of separation.
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Rei's horrible work-life balance leads to him getting sick, so Akai steps (breaks) in to take care of him.
Series
- Part 2 of to cherish
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Fear prompts an accidental confession.
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To Love and To Lose by cosmicarp for riafya
Fandoms: 名探偵コナン | Detective Conan | Case Closed
14 Feb 2026
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The best Valentine's Day Rei ever had was spent with the man he now hates most. It's fitting, then, that his worst Valentine's Day would be spent with that same man.
There's just one problem: that man died yesterday.
(An Akai Death Day/Valentine's fic)
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- Part 1 of to cherish
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Hate at first sight is an unconventional introduction to one's soulmate.
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Healing isn't linear. Rei has a bad mental (and physical) health day.
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- Part 2 of best strangers
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Shuuichi acquiesces, stepping aside to let him through. "You first." The I'll catch you if you fall is implied, but he doesn't need to say it aloud for Rei to give him that dubious look.
"You're carrying the groceries," he argues, with a small gesture toward the bag Shuuichi took from him.
"The groceries can be replaced, if necessary."
A small peek into post-canon (AU) ShuuRei's life together.
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- Part 1 of best strangers
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Rei, surrounded by three of his four best friends, in the aftermath of Akai's death at Raiha Pass.
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“You think I’m charming, Bourbon?”
The roll of Rei’s eyes is practically audible as he replies, “As charming as a slippery, slimy little toad.”
Unperturbed, Rye rises to the bait, leaning in towards Bourbon as Hiro turns back to watch them. “I hear toads sometimes turn into princes if the right person kisses them.”
The self-indulgent Shuuichi/Rei & Hiro/Rei Soulmate AU that literally nobody asked for.
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Rei sighs, looking to Natalie-san, amused, exasperated, but surprisingly unable to find any anger inside himself. "Would you like to bully me, too?" he asks.
"No, I think the boys have it covered," she answers, eyes glittering with mischief.
A Christmas gathering with Rei and all of the most important people in his life.
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It's Not Pining, It's Reconnaissance by cosmicarp for nanoko857
Fandoms: 名探偵コナン | Detective Conan | Case Closed
16 Dec 2025
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He tells himself it's for intel purposes – 'know your enemy' and all that, never mind that they're hardly enemies anymore – and maybe that was true, at first. But even he can't deny that this has gotten out of hand.
Rei embarks on a mission to make the perfect cup of coffee.
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As he sorts through his options, ruling out anything with too high of a collar or in a bland beige, his hand lands on a soft, sky-blue sweater that dredges up memories of a night several months ago.
Rei borrows some clothes.
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He has two choices. One: he can stay in bed, pretend to still be sleeping, right up until she leaves. Akai probably wouldn’t even begrudge him that.
Two: he can get up and meet his future – temporary – mother-in-law.Amuro Tooru's apartment burns down, and that's only the beginning of Rei's troubles.
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Shuuichi and Rei share a quiet morning, making plans and just being in love.
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Getting engaged to a coworker was not on Rei's To Do List for the day.
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December 7, 5:03 AM.
He has another chance. This time, he’ll get it right.
Letting go was never an option.
A Whiskey Trio time loop AU.
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As the Dust Settles by cosmicarp for thescarletthread
Fandoms: 名探偵コナン | Detective Conan | Case Closed
13 May 2025
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In the aftermath of the Black Organization being taken down, it's brought to Rei's attention that there's someone new (or not so new, as it turns out) in Hiro's life.
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Sometimes all it takes to bring an unconventional family a little closer together is a dramatic haircut.
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- Part 1 of the chaos gremlin siblings au