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threesentenceficathonTHIS POST IS NOW CLOSED TO NEW PROMPTS.
New prompts can be posted to Post 4.
Fills may continue to be posted to this post at any time.
Post 1 and Post 2 also remain open for fills.
Note our 2026 Friending Meme is now up; feel free to post there if you're looking for new fandom friends!
This post will remain open for new prompts until we hit 4000 comments, at which point we'll open a new one to avoid captcha as long as possible. New fills and comments on fills are always welcome.
How-To's, Rules and Notes Behind the Cut
Prompts should be one prompt per comment, formatted in this way: fandom, character(s), prompt word/sentence
Prompts may also be open ended, unspecific, or anthropomorphic, such as:
or
Earth geography, sand, I don't like humans very much, either
Prompts for relationships are welcome; a / is used for romantic/sexual relationships and an & for platonic. A prompt that uses both means the relationship can be written as either romantic or platonic, such as:
Prompts may be repeated if they are unfilled; there is no obligation to read through every prompt to make sure yours isn't a repeat. This year's 3SF will stay open for new prompts through Sunday, February 15th.
Respond to your chosen prompt with a short fic of three sentences containing the fandom & characters requested!
Prompts can be filled more than once, as many times as someone has a new idea for them.
No, fills do not need to be exactly three sentences! It's more of a guideline. Please abuse grammar and punctuation as much as desired.
3SF is a Choose Not to Warn space. Spoiler and content warnings are not required, though writers are free to add them if they please. If you see something you don't like, just scroll until you do!
A Dreamwidth account is not needed to participate. Anonymous prompts/fills are welcome, or you can use Open ID. Using an account does make it easier to see people's responses to your fills though!
Cross-posting is encouraged; there is a 3SF Collection on AO3 if you'd like to post fills there as well.
Note that the comm is searchable if you're logged in! Tick the 'include comments' button when searching to easily find prompts for your chosen fandom/characters.
And most importantly, have fun! If you have questions, check the Sticky Info post and if they're not answered there, head to the Contact the Mods post.
Please remember to check through the rules and info and then go absolutely wild.
no subject
Date: 2026-01-27 06:01 pm (UTC)Clair Obscur: Expedition 33 (postgame), Verso/Maelle, Do you wish it were her?
Date: 2026-01-28 07:01 am (UTC)"What?" Verso asks—and Maelle answers with a whorl of chroma, a hand passing over her face, and then her face is rounder, the hair browner, and the eyes—oh God, the eyes, her eyes—
"Maelle, no," he says, but Maelle's not listening to him—she's answering to the part of him inside her, which he knows, humiliatingly, has gone stiff at once at the memory of Julie, and her smile looks just the way he remembered—painfully so.
Re: Clair Obscur: Expedition 33 (postgame), Verso/Maelle, Do you wish it were her?
From:Re: Clair Obscur: Expedition 33 (postgame), Verso/Maelle, Do you wish it were her?
From:Re: Clair Obscur: Expedition 33 (postgame), Verso/Maelle, Do you wish it were her?
From:Re: Clair Obscur: Expedition 33 (postgame), Verso/Maelle, Do you wish it were her?
From:If You Just Want to Be Bad
From:Re: If You Just Want to Be Bad
From:Re: If You Just Want to Be Bad
From:Re: If You Just Want to Be Bad
From:Re: If You Just Want to Be Bad
From:no subject
Date: 2026-01-27 06:03 pm (UTC)Our Flag Means Death, Izzy Hands/Ed Teach, Major Character Death
Date: 2026-01-27 11:25 pm (UTC)Cut for Major Character Death/Ghost Fic
Twenty-some years of his life spent at Ed's side as the sort of stubborn idiot who never had the strength to leave and stay left, is it any wonder he's still here after he's dead and buried?
He sits atop his grave, watching the tides come in and go out again, watching the inn come together, rolling his eyes when Ed and Bonnet are capering like sand-boys and shouting at them to tighten up when they're on the outs—about as heeded now as he ever was, which isn't much but isn't nothing.
It was always going to get him killed, loving that man, but if his last days on this earth saw him laid to rest in the place Ed calls home instead of thrown overboard alone into the cold, dark water, Izzy Hands is still enough of a stubborn idiot to be thankful.
Re: Our Flag Means Death, Izzy Hands/Ed Teach, Major Character Death
From:Re: Our Flag Means Death, Izzy Hands/Ed Teach, Major Character Death
From:Re: Our Flag Means Death, Izzy Hands/Ed Teach, Major Character Death
From:Re: Our Flag Means Death, Izzy Hands/Ed Teach, Major Character Death
From:Original Haiku
From:Re: Original Haiku
From:Riverdale | Alice?FP (who knows)
From:The Story of Minglan
From:no subject
Date: 2026-01-27 06:03 pm (UTC)any, any, it's okay, it's okay / my love will fall with grace
The Legend of Zelda: Breath of the Wild; Mipha
Date: 2026-01-29 09:49 am (UTC)It's also present in her observation of the way that the Princess, formerly so scornful toward Link, has now softened in her manner toward the Knight; something has changed, there; Zelda seems almost to be half in love with Link, herself.
Mipha doesn't mind; she's too timid around Link to speak out regarding her own feelings, willing to go on healing him, when necessary; love itself best decides how it should be expressed.
no subject
Date: 2026-01-27 06:04 pm (UTC)I Will Die For How I Care
Date: 2026-01-28 07:53 am (UTC)“Not before,” Maelle says, chewing on her lip in the most distracting way, his eyes drawn to it again and again, “but I think I might be now.”
It feels wrong, in this particular situation, to thank the Paintress, but she’s the only god Verso’s ever known; at least until the moment he sees an entirely new one born in Maelle’s eyes when he says, “Funny, but so do I.”
Re: I Will Die For How I Care
From:Re: I Will Die For How I Care
From:no subject
Date: 2026-01-27 06:05 pm (UTC)This Is My Prayer
Date: 2026-01-28 07:27 am (UTC)Odysseus breathes in, and for a moment, she can feel exactly what he will say, just another thing she is named and does not truly feel like, before he hesitates, his voice lower than she’s ever heard it as he says, “Melinoe – that is who you are,” and steps closer, his hand hovering over hers before he says it again: “Melinoe – my goddess, my beloved one,” and, well, she supposes that’s more than enough to go on, for one more night.
Re: This Is My Prayer
From:Re: This Is My Prayer
From:no subject
Date: 2026-01-27 06:06 pm (UTC)Original Poetry; original character
Date: 2026-01-28 04:47 am (UTC)If you want any genre, then just let me know.
Then hand me a cast, and I'll give it a go.
Re: Original Poetry; original character
From:Re: Original Poetry; original character
From:Genshin Impact, Furina/&Neuvillette
From: (Anonymous) - Date: 2026-02-12 08:57 am (UTC) - ExpandRe: Genshin Impact, Furina/&Neuvillette
From:Ace Attorney, Larry Butz, Youtuber AU
From:no subject
Date: 2026-01-27 06:06 pm (UTC)no subject
Date: 2026-01-27 06:07 pm (UTC)Doctor Who; River Song
Date: 2026-01-30 07:56 am (UTC)And she certainly doesn't envy anyone who'd be foolish enough to try to piece together her history with the Doctor; a tangle like that would be impossible for anyone who isn't either of them--and it isn't a simple matter, even then!
Re: Doctor Who; River Song
From:no subject
Date: 2026-01-27 06:09 pm (UTC)no subject
Date: 2026-01-27 06:10 pm (UTC)no subject
Date: 2026-01-27 06:11 pm (UTC)Yacht Club (Mouretsu Pirates; Jenny/Lynn)
Date: 2026-01-28 02:27 am (UTC)Jenny stepped out and, frankly, smoothly took over before Brittany could do more than introduce them, and Lynn followed her wife out, smiling at the girls - stars and circuits, had they ever been so young, she wondered faintly - as she took in the changes, as well as what had remained precisely as she remembered the beloved room. The place where, so long ago now, Jenny had swept her off to, after finding her . . . testing some of the restrictions she'd been put under; given her new friends and new purpose as well as . . . Lynn watched her wife command the attention of everyone in the room - half the girls were gazing at her worshipfully already; it was a familiar sight.
Re: Yacht Club (Mouretsu Pirates; Jenny/Lynn)
From:Re: Yacht Club (Mouretsu Pirates; Jenny/Lynn)
From:BtVS – Willow/Tara – Never Forgotten
From:Re: BtVS – Willow/Tara – Never Forgotten
From:Re: BtVS – Willow/Tara – Never Forgotten
From:Re: BtVS – Willow/Tara – Never Forgotten
From:Re: BtVS – Willow/Tara – Never Forgotten
From:The Old Guard, Andromache/Quynh
From:Re: The Old Guard, Andromache/Quynh
From:Re: The Old Guard, Andromache/Quynh
From:Genshin Impact, Edler/Wislawa
From: (Anonymous) - Date: 2026-02-12 09:13 am (UTC) - ExpandRe: Genshin Impact, Edler/Wislawa
From:no subject
Date: 2026-01-27 06:11 pm (UTC)Final Fantasy VII; Aerith/Tifa (mentions of canonical character death)
Date: 2026-01-30 12:02 pm (UTC)She'd faced Sephiroth once and lost, but she was a child then, wide-eyed and optimistic, and her hands now know blood and sweat and the pain of fighting, fighting, fighting, and the others would have stood beside her -- Barret, and Cloud, and Cid, and Red, even Yuffie and Vincent, to prevent the tragedy unfolding before them.
But when she's alone, Tifa remembers the last night together with Aerith in their tent, giggling over gossip, the softness of her kisses, the gentleness in her sighs as Tifa worked her fingers inside her, and how Aerith's mouth had lingered over Tifa's; how had she missed that Aerith was really saying goodbye?
Re: Final Fantasy VII; Aerith/Tifa (mentions of canonical character death)
From:Dreamcatcher Deja Vu MV, Yoohyeon/Jiu, unavoidable tragedy
From:Re: Dreamcatcher Deja Vu MV, Yoohyeon/Jiu, unavoidable tragedy
From:Re: Dreamcatcher Deja Vu MV, Yoohyeon/Jiu, unavoidable tragedy
From:911, Hen/Karen
From:Re: 911, Hen/Karen
From:The Old Guard, Andromache/Quynh
From:Re: The Old Guard, Andromache/Quynh
From:BtVS – Willow / Tara – Darkness Descending
From:Re: BtVS – Willow / Tara – Darkness Descending
From:Re: BtVS – Willow / Tara – Darkness Descending
From:no subject
Date: 2026-01-27 06:11 pm (UTC)Michael/Tilly (ST: Discovery), NSFW
Date: 2026-01-27 06:58 pm (UTC)"I've missed you," Michael says, stripping them both with an efficiency Tilly doesn't think she had a week (a year) ago, her rough traveller's outfit dropping to the floor to reveal new scars that Tilly reaches out to trace as Michael keeps talking, words overflowing to fill the space Tilly usually takes, but tonight Tilly just wants to listen, to hear Michael's story, to re-learn her lover.
So she touches Michael, asks questions, slips her fingers into Michael's cunt (which opens to her just as it always has, warm and soft and wet) and kisses Michael's ribs, up onto her taut breasts until she can mouth at Michael's nipples, make her voice shake as she keeps talking, hum encouragement as she sucks hickey's into Michael's neck while Michael's fingernails dig into her back and she tells Tilly to Keep going, don't stop, just like that and Tilly listens, keeps fucking her, keeps reminding her that they're together again and that's all that needs to matter here and now.
Re: Michael/Tilly (ST: Discovery), NSFW
From:Re: Michael/Tilly (ST: Discovery), NSFW
From:Gossip Girl, Blair/Georgina, carnal
From:Re: Gossip Girl, Blair/Georgina, carnal
From:Testament of Ann Lee, Mary/Ann UST
From:Re: Testament of Ann Lee, Mary/Ann UST
From:Re: Testament of Ann Lee, Mary/Ann UST
From:Bleach, Isane Kotetsu/Rangiku Matsumoto
From:Re: Bleach, Isane Kotetsu/Rangiku Matsumoto
From:Re: Bleach, Isane Kotetsu/Rangiku Matsumoto
From:Genshin Impact, Edler/Wislawa
From: (Anonymous) - Date: 2026-02-12 09:52 am (UTC) - ExpandRe: Genshin Impact, Edler/Wislawa
From:Fear & Hunger: Termina, Marina/Samarie
From:Re: Fear & Hunger: Termina, Marina/Samarie
From:no subject
Date: 2026-01-27 06:11 pm (UTC)no subject
Date: 2026-01-27 06:12 pm (UTC)Girl Genius, Tarvek & Anevka
Date: 2026-01-27 10:34 pm (UTC)He doesn't know when she died.
He can pin it down to a week, but the day his sister was fully replaced by the clank he'd built and convinced not only his father but it itself that it was her-- he doesn't know. He couldn't tell.
A testament to his skill, he supposes.
It wasn't obvious, it wasn't noticeable; that would have ruined everything, and his creations, his plans, do not end in failure and ruin. It was slow. It was so slow. She didn't even know it was happening; if she had, the clank would have-- but he expected it. He knew it would happen. He should have--
Their father killed her. He kept her alive for a while, and maintained the semblance of her for much longer.
He doesn't know when she died.
Re: Girl Genius, Tarvek & Anevka
From:Re: Girl Genius, Tarvek & Anevka
From:Re: Girl Genius, Tarvek & Anevka
From:Special Days (Original - Renaud's Family; Julian, Sylvester, Jacques)
From:Re: Special Days (Original - Renaud's Family; Julian, Sylvester, Jacques)
From:Re: Special Days (Original - Renaud's Family; Julian, Sylvester, Jacques)
From:Morimens, ensemble
From: (Anonymous) - Date: 2026-01-29 09:00 pm (UTC) - ExpandBleach, Kenpachi Zaraki/Retsu Unohana + Isane Kotetsu
From:War of the Worlds (1988-90) – Harrison Blackwood – To Fallen Friends
From:BSC | Richard/Sharon (past Richard/Alma)
From:Scarlet Heart (2011)
From:Re: Scarlet Heart (2011)
From:The Old Guard, Nile
From:no subject
Date: 2026-01-27 06:12 pm (UTC)Steal My Heart Away
Date: 2026-01-29 05:01 am (UTC)“If you’re about to say you’re too old for me, that’s nonsense–what could age possibly matter now,” she says, frowning, and he hesitates a beat too long before blurting out the truth, wrapped in layers of obfuscation like old paint: “I don’t want to hurt you.”
But Maelle only smiles once more, the movement of her mouth mesmerizing as she gives him her vow; “I promise you won’t break me, Verso,” she whispers into his mouth, and he surrenders to her, to his desire, to every worst part of himself.
Re: Steal My Heart Away
From:Re: Steal My Heart Away
From:no subject
Date: 2026-01-27 06:12 pm (UTC)no subject
Date: 2026-01-27 06:13 pm (UTC)Bleach, Kenpachi Zaraki/Retsu Unohana (6 sentences)
Date: 2026-02-04 01:17 am (UTC)A brief pause to catch their breaths; she's smeared her lipstick all over his mouth, chin, jaw and neck, and he has never looked so wonderful than now, with hooded eyes, cheeks flushed, edge of his forehead glistening with sweat, that Unohana can't help but smile with all the adoration in her heart as she reaches to try and clean his face —a habit to which he responds by taking her wrist in his hand before diving into her mouth again.
But however young the night is, today every minute is especially precious and the only thing they have, so she pushes her free hand between their bodies, down his chest, dragging her nails against the fabric of his shirt to memorize each curve and pull of his abdomen until she reaches his zipper.
"No." He peels himself off her, off the the bike, long legs dismounting her to stand, and she's too stunned to ask or protest, the only feeling in the world being how cold she's gotten from his abrupt absence.
She sits up when he makes for his own vehicle, straddling it in a way that makes her so suddenly jealous and furious, but his back to her keeps her silent.
"Ya only drag me all the way to the middle of nowhere to fuck me right before ya disappear." That's it, plain and simple, and so burnt out, that Unohana can only chew down on her tongue, ashamed; "…I'll just wait 'till ya come back."
Re: Bleach, Kenpachi Zaraki/Retsu Unohana (6 sentences)
From:Re: Bleach, Kenpachi Zaraki/Retsu Unohana (6 sentences)
From:no subject
Date: 2026-01-27 06:13 pm (UTC)no subject
Date: 2026-01-27 06:14 pm (UTC)When It's So Wrong
Date: 2026-01-29 02:53 am (UTC)“I did,” he says against her ear, a plea almost as desperate as she is, holding her tight as she struggles against him, “and you liked it.” For a moment, Maelle goes limp in his arms, her body shuddering, her breathing ragged, and he takes the risk, whispering, “You’d like it again, wouldn’t you?” to her; Maelle chokes out a sound akin to a sob, but still, she turns in his arms, threads her hands through his hair, and opens her mouth for his tongue.
Re: When It's So Wrong
From:Re: When It's So Wrong
From:no subject
Date: 2026-01-27 06:16 pm (UTC)Pokemon anime, Team Rocket
Date: 2026-03-08 04:18 pm (UTC)"Someone get me to the Pokemon Center, quick," Meowth said, as he stumbled around holding his face in his paws.
"Oh, don't be a baby. Come here," James said, and Meowth trustingly followed the sound of his voice, and when Meowth lowered his paws from his face to look up at his human friend, James sprayed a Potion on the throbbing red lump on Meowth's forehead.
The Fantastic Journey – Sil-El, Liana & Travellers – Cat’s Eyes
From:no subject
Date: 2026-01-27 06:16 pm (UTC)Longing, Matched (Hellboy; Nuada/Nuala) - CW: incest
Date: 2026-01-28 02:42 am (UTC)I miss you, a deartháir, a chuisle; I want you, Nuala's words, her mind, are shot through with tremors, but her hands are steady, and Nuada opens himself to her, feeling the caresses, fingers flexing as he licks his lips, willingly losing himself to her touch.
Re: Longing, Matched (Hellboy; Nuada/Nuala) - CW: incest
From:Re: Longing, Matched (Hellboy; Nuada/Nuala) - CW: incest
From:Re: Longing, Matched (Hellboy; Nuada/Nuala) - CW: incest
From:Re: Longing, Matched (Hellboy; Nuada/Nuala) - CW: incest
From:Re: Longing, Matched (Hellboy; Nuada/Nuala) - CW: incest
From:Re: Longing, Matched (Hellboy; Nuada/Nuala) - CW: incest
From:I Know Your Mind (Cyberpunk 2077, Johnny/V)
From:Re: I Know Your Mind (Cyberpunk 2077, Johnny/V)
From:Re: I Know Your Mind (Cyberpunk 2077, Johnny/V)
From:no subject
Date: 2026-01-27 06:17 pm (UTC)no subject
Date: 2026-01-27 06:18 pm (UTC)Genshin Impact, Furina/Neuvillette
Date: 2026-02-12 10:02 am (UTC)Furina's control over the Hydro in his blood is still trembling, still uncertain; her brow furrows as she directs both his hands above his head—wrist to wrist, pinned in place—leaving him open and vulnerable to her.
Neuvillette exhales, heart pounding, mindful of the blood rushing in his ears, taking care not to let it break her fragile control; "Well done," he manages, sees her flush with pride.
no subject
Date: 2026-01-27 06:27 pm (UTC)no subject
Date: 2026-01-29 12:32 am (UTC)I tried to be calm about this, tried to tell myself I was looking too far into things, but I did a little digging and... boys, girls, squirrels and non binary baddies... I think I struck gold here so let me just show you...
Photographic evidence to show that Abbinu are madly in love and how they are letting us know 🧵 (1/18)
[Photo description is of Kpop boyband Saju Boys, with leader Jinu on front and fellow Saja boy Abby with his arm around Jinu's shoulders, both men are smiling at each other]
"Hi, guys, I'm Kim, your number one Romabby girl! I have to admit that I was a little bit sad after we got that last interview with our boys because, um, did you see how far my dear Romance and HUNKADUNK delicious Abby were from each other? I'll admit that I even glared a little to our dearest leader, Jinu, because he was simply TOO CLOSE to Abby, but then I thought, 'girl, relax! Jinu and Abby are obviously besties, Jinu is just offering our boy Abby moral support after what was probably a fight with his BF! You'd go to your bestie if you had a fight with your bf' and the I thought, omg, are they FIGHTING? And I think they are! Because see, usually at this part in Soda Pop when Romance finishes singing he turns to look towards Abby, and this time he didn't! OMG, Romance, Abby, I hope they reconcile soon! I don't want to be a child of divorce!"
(no subject)
From:(no subject)
From: