Dimileth Fever

I’m horrible at posting things to tumblr. but i wrote a Frankenstein AU for the Dimileth Exchange! you can check it out here (and please look at all of the other ones!)

And my second fic for @dimilethfever Valentines Exchange! Wrote this treat for Queso, in which Dimitri and Byleth are in a secret relationship and Jeralt lives!

Dimitri already expected Father, Stepmother, and Glenn to taunt him and convince him that proposing to Byleth was a mistake. He almost considered passing it off as a joke at the last second as Glenn was right that he wouldn't have a future to promise to someone and not have Byleth go through with that. And yet, he would also regret backing out and running away like a coward. He at least has to try.

Byleth stood there with a neutral expression on her face, but her lips quirked slightly upwards, and she had her chin resting on her fist. As if she was seriously considering wishing that also.

Not wanting to wait for her response and to show that he was serious, Dimitri fell on one knee, pulled out the dagger from its sheath, and presented it to her. Byleth's eyes grew wide, as if she wasn't expecting that.

Hiya! I wrote two fics for the @dimilethfever Valentines Gift Exchange! First one is my main piece in which Dimitri and Byleth celebrate Dimitri's birthday! Also features nonbinary Byleth!

On the morning of Dimitri's birthday, Byleth woke up early to make his breakfast in the dining hall's kitchen. When they returned, Dimitri still slept under the comfort of his mattress. Sunlight streamed through the windows and bathed Dimitri's face in golden light.

He looked so peaceful and pretty when he slept, Byleth mused to themselves. After setting the breakfast aside on the table, they moved to the bed and slid their fingers through Dimitri's hair. That eventually caused Dimitri to stir awake with a soft sound and flutter his eyes.

"Happy birthday, Dimitri," Byleth said with a small smile and kissed Dimitri's forehead.

Dimitri offered them a sleepy smile and sat up. "I appreciate the birthday wishes, beloved." He and Byleth shared a chaste kiss, and immediately after, Dimitri's nose wiggled and his gaze fixed on the food on the table. "Is that our breakfast over there?"

"It is. Why don't we go enjoy it together right now?"

Do you like Dimileth? Want to make a gift for somebody and get one in return? Signups for Dimileth Valentine's Gift Exchange are open until Dec 13 2025, 11:59 PM CST!

This is an AO3 fanworks exchange for the ship Dimitri/Byleth from Fire Emblem Three Houses and Fire Emblem Three Hopes. All versions of Dimileth are welcome - when signing up, you can specify what version(s) of Byleths you'd like to create and receive, as well as what ratings and tropes/genres you're interested in.

💌 Assignments will go out by Dec 18 2025, and works will be due Feb 7, 2026. Everyone who turns in a gift gets a gift, guaranteed.

💌 You can find more explanation of how the exchange works and how to sign up here on our carrd!

Rating: E

Word Count: 6598

Summary: Dimitri and Byleth retired from their duties as king and archbishop to become farmers and live in a humble space to grow crops together. They much prefer the peaceful life they're having over being responsible for a whole nation. When Sylvain comes to convince them to come back to Fhirdiad, they show him how much happier they're better off as farmers.

Rating: E

Word count: 5671

Summary: Dimitri and Byleth are happily married and want to give the world to each other, including each other's erotic fantasies. For their wedding anniversary, Dimitri does a sexy pin-up photoshoot while Byleth wears a revealing lingerie for him.

After a tragic accident shatters Byleth’s dreams of greener pastures, she wakes up from a seven-year coma to find Dimitri, her foster brother, waiting for her.

Dimitri is the perfect caretaker. He’s sweet and patient, always tending to her every need with devotion and an unwavering smile. So when a quiet unease stirs within her—when his touch lingers, when his kindness feels a little too perfect—Byleth ignores it.

He just misses her. That’s all.

–

Written for @dimilethfever's Dimileth Valentine's Gift Exchange 2025 as a gift for @dimilethoe.

Fandom: Fire Emblem: Three Houses

Rating: M

Word count: 2,611

Summary: After the Battle at Gronder, Dimitri notices Byleth was wounded in battle. He doesn't forgive her.

Continue on ao3.

Byleth tugs on the reins of her mare and tangles her fingers through the soaked white mane. For a moment, the hair that knots around her hands is a tether that keeps her upright through the sudden springtime downpour.

As the sun sets behind her and her party, shards of water slice through the orange sky. Mud splashes with each clop of horse hooves and with every heavy step away from Gronder Field. Wagons trail behind them, dragging unceremoniously though the sloshing earth while carrying bodies.

The battle was long and relentless with too many casualties to count. But somehow, the dead do not outnumber the living even if just barely. Still, their weight is a boulder hanging around Byleth’s neck. And one body up ahead is pulled by Felix alone—though his childhood friends try to keep him company. Sylvain flits beside Felix though he is ignored, and Ingrid attempts to tuck the cloth around Rodrigue’s corpse without tripping through the sludge. Dimitri, muttering and lost, stumbles on his own mount beside the cart like an unfettered ghost.

Written for @dimilethfever's Dimileth Valentine's Gift Exchange 2025 as a treat for yanyan46e20.

Fandom: Fire Emblem: Three Houses

Rating: T

Word count: 2,455

Summary: Byleth is an ancient nature spirit who meets a wandering prince in her domain.

Continue on ao3.

Humans were fickle creatures. Forever changing, forever wanting—they confused her in ways others of her kind would not. Gangly, squat, even graceful at times. What confused her more was the fact that so many of them were different from each other.

Some of them talked to her as they trailed along the winding mountain path, knocking their walking sticks against stones and avoiding roots that jutted from the frozen earth. Others claimed to speak to her and her kind on a deeper level. They called themselves mediums who built bridges between her world and the material world. But many others still could never see her, their eyes blind to that which was not material.

“With your permission,” the humans said as they bowed into her domain. Though most could not see her, they greeted her like this, fearful of inciting her wrath. The children especially were told to do this with stern scolding, for the young ones often enjoyed adventuring into the unknown.

Once, she was the great spirit Byleth, the Lady of the Mountains, the Guardian of Gwenhwyvar. Her home was a towering elm tree that was as wide as a house. In its hollow she lived, watching over the Sacred Gwenhwyvar mountains through the seasons.

Fandom: Fire Emblem: Three Houses

Rating: E

Word count: 3,749

Story summary: After Dimitri returns to his senses after the Battle of Gronder Field, he acts oddly restrained around Byleth—and she can’t figure out why. (Dimileth)

Written for @mochipicchu776 for the Dimileth Valentine's Exchange 2025, run by @dimilethfever

Read on AO3

————–

Byleth finds Dimitri in the training grounds.

Decked in full armor, he steps and swipes and parries at an invisible opponent. His lance glints in the sun, and his cloak sweeps behind him like a frenzied banner in his wake.

This is the first time she’s seen him train since the attack on Garreg Mach five years ago. The first time since he snarled at her in the Goddess Tower and accused her of being an imperial spy. The first time since Gronder Field, since…

Since Rodrigue died.

There’s something about the way he moves—more forceful, more desperate than she remembers. His strikes are furious and raw, like the growl that tears from his throat when he impales his enemies on his lance.

Do you like Dimileth? Want to make a gift for somebody and get one in return? Signups for Dimileth Valentine's Gift Exchange are open until Dec 15 2024, 11:59 PM CST!

This is an AO3 fanworks exchange for the ship Dimitri/Byleth from Fire Emblem Three Houses and Fire Emblem Three Hopes. All versions of Dimileth are welcome - when signing up, you can specify what version(s) of Byleths you'd like to create and receive, as well as what ratings and tropes/genres you're interested in.

💌 Assignments will go out by Dec 20 2024, and works will be due Feb 7, 2025. Everyone who turns in a gift gets a gift, guaranteed.

💌 You can find more explanation of how the exchange works and how to sign up here on our carrd!

All 108 works in the Dimileth exchange collection are revealed - go forth and feast! 🍽

For a bit of extra fun, and to encourage exploration of the collection, all works will be anonymous for the first week. See if you can spot anyone you know!

And if you're still wrapping up a treat, don't worry: the collection will remain open for treating.

For folks in the exchange:

• Make sure to leave your gifter or gifters a kind comment!

• Refrain from posting about your own work until creators are revealed on Jan 21 (posting recs or gushing about your gift are fine!)

• You may want to redate your work so it shows up above works that were posted in the main tag while it was unrevealed. Instructions on how to do that are on our carrd here

For everyone - comment raffle!

To celebrate the collection opening, we're running a comment raffle! Comment on works in the collection by Jan 21 (10 PM CST), and enter to win a ficlet or sketch for a Dimileth prompt of your choice!

If you'd be interested in offering an additional prize, just let us know!

Title: The Bachelor Characters: Dimitri/Byleth Summary: Byleth works part-time at a café inside Fhirdiad General Hospital. During one of her shifts, one of the doctors there, Doctor Dimitri Blaiddyd, visits the café and is immediately enamored by her. She too is very interested in him and they start seeing each other.

Early in their relationship, Dimitri showers Byleth with luxury items and attention that causes her to feel very uncomfortable. She brings that up during their romantic trip to a mountain resort, only for him to offer her a marriage proposal instead.

Warnings: NSFW. dubious consent, noncon, impaired consent, non-consensual drug use, aphrodisiacs, emotional manipulation. This isn't my usual fluff Dimileth stuff, so tread carefully!

Second piece for @dimilethfever Dimileth Winter Exchange! This is a treat for @flatsuke!

Excerpt: "Good morning, Miss."

Byleth was snapped out of her woeful musings when her next customer showed up. She could tell he was a doctor based on his white doctor's coat and badge. His bright blonde hair was tied in a half-ponytail, and he had shimmering blue eyes like ocean waves. He seemed to be on the younger side compared to the other doctors who dropped by here, but she was certain he was several years older than her. She had seen this particular doctor in and out of the hospital a few times, but he just came to the café now.