Sapphire Twilight
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sapphiretwilight.bsky.social
Sapphire Twilight
@sapphiretwilight.bsky.social
Hi, I'm a BKDK writer!
NSFW on here, so please 18+ only!

Ao3: https://archiveofourown.org/users/SapphireTwilight/profile
Commission Form: https://forms.gle/yeFxs8hvwz5rMfVj6
Patreon (Exclusive stories/polls): patreon.com/SapphireTwilight
Alright, here you go! The Patreon exclusive College BkFemDk story you've been waiting for.

AKA Izuku has a twin sister, Ochaco. She's happy her sister is so popular, and doesn't mind being a 'nerd'.

So why does popular hockey player Katsuki keep trying to talk to her?

⬇️Link
November 12, 2025 at 11:01 PM
#BkDk #SapThread (Older Queen A/B/O) Pt5

Seven weeks after making his boldest decision since putting on his crown, Izuku knows sparing Kacchan was the right choice.

He's insightful, unafraid to say when he notices a gap or weakness in Trev's systems.

And Izuku thinks they're... friends.
November 11, 2025 at 10:23 PM
Retro Monday is back with the second chapter of the Bff Big Brother story! A little more... 🌶️🥰

I've had so much fun cleaning this story up, so I hope you enjoy the read!

Title: Love? Oh Brother...
Pairing: BakuDeku, TogaChaco, Kudoichi
Rating: Ex
Chapters: 2/4

Link⬇️
November 10, 2025 at 9:00 PM
Sooo all the goals were DESTROYED this week! I don't have enough days for everything! 😂

Here's the BkDk✍️ Schedule

Mon: ❤️? Oh Brother Ch2(Ao3)
Tu: O!Queen Pt5🧵
W: BkFemDk Ch1 (Patreon)
Th: 🩲 Sneak Peek Ch2 (Patreon)
Fri: 🩲 Ch2 (Ao3)
Sat/Sun(?): O!Queen Pt6🧵
November 10, 2025 at 5:01 PM
#BkDk #SapThread (Older Queen A/B/O) Pt4 🌶️
Katsuki doesn't know what to make of the queen.

After their conversation in the tunnel, the omega takes Katsuki into the barracks, letting him see his men.

He smiles, laughs, engages with the soldiers like he's happy.

Katsuki has doubts.
November 9, 2025 at 10:21 PM
A bit late, but it's here!

Come check out my new Ao3 story, where Izuku learns a little (and Katsuki ALOT) about himself... through the power of panties!

(And check out my other Ao3 story, too!)

Title: Slipping Into Love
Pairing: BakuDeku
Rating: Ex
Chapters: 1/4

Link⬇️
November 7, 2025 at 9:21 PM
#BkDk #SapThread (Older Queen A/B/O) Pt3

"I should have known I'd find you here."

Izuku lifts his head from the irrigation schematics, his fatigue vanishing when catching sight of his visitor. "My King-"

"Just Toshi." The man who raises him gives a soft smile. "I'm here to visit my son."
November 4, 2025 at 11:27 PM
The time has finally come! The first part of 'BFF Big Bro' (with an added scene) is up on Ao3!

Come give love🥰 I have been working super hard to clean it up, so lmk how I did!

Title: Love? Oh Brother...
Pairing: BakuDeku, TogaChaco, Kudoichi
Rating: Ex
Chapters: 1/4

Link⬇️
November 3, 2025 at 9:47 PM
Wow y'all destroyed the O! Queen 🧵goal. As a reward, hitting Tu's goal will get you a second update

Here's the BkDk✍️ Schedule

Mon: BFF Big Bro Ch1 (Ao3)
Tu: O!Queen Pt 3 🧵
W: Libahunt Ch4 (Patreon)
Th: Panties Sneak Peek (Patreon)
Fri: Panties Ch1 (Ao3)
Sun: O!Queen Pt4🧵(?)
November 3, 2025 at 5:01 PM
#BkDk #SapThread (Older Queen A/B/O) Pt2

Katsuki loses his parents when he's ten.

Before that, life's perfect. His mother's a seamstress, hot-headed and full of pride in Katsuki. His father is an amazing fisherman who gives Katsuki the best hugs.

He's happy. Loved. Then, the raid happens.
November 2, 2025 at 10:12 PM
Also I probably should have let people over here know, but if you find it hard to follow all the updates on Threads, Ao3, and Patreon, I have a discord now!!

It's JUST updates. You can sign up for which ones you want, and I'll ping when I post.

The link is down below, enjoy!
October 31, 2025 at 8:33 PM
Alright! Time for my new one shot, commissioned by @/DaRealTBossK. Thank you so much for your idea, and I can't wait for people to get to witness the silly cuteness.

Title: Love Is Blind
Pairs: BakuDeku, Hinted ShinMono
Rating: T
Words: 6.3k

Link⬇️
October 31, 2025 at 8:05 PM
#BkDk #SapThread (Older Queen A/B/O) Pt1

"Queen Midoriya." Izuku almost laughs at the title, knowing he barely looks the part.

Leading his army, his crown's left in a castle he hasn't seen for months. He's tired. Cold. Worn down. Blood coats his armor from both sides of this pointless war.
October 28, 2025 at 9:04 PM
Wow, first week after Ember's done... bittersweet. BUT we still have stuff that I think you're gonna LOVE!

Here's the BkDk✍️ Schedule

Mon: Polls (One Twitter, One Patreon)
Tu: Younger Prince A!Bk Older Queen O!Dk🧵
W: Libahunt Ch3 (Patreon)
Fri: Ao3 BkDk oneshot (Comm)
Sun: ???🧵
October 27, 2025 at 4:01 PM
#BkDk #BakuDeku #SaphThread (A/B/O Wedding Escape) Pt4 FINALE

Katsuki doesn't really think about courting, because he's not a mindless alpha guided by his need to bite and breed. He's been the villager's provider of food and protector of those who would do them harm.

But for Izuku... he researches
October 26, 2025 at 9:17 PM
Well, we're here. The final chapter of Embers. I won't linger, but I'd love you to leave your favorite scene/character/moment over on ao3!

Thank you everyone who supported me🧡💚

Title: The Ember Between Us
Rating: Ex
Main Pair: BkDk (others in tags)
Chapter: 21/21

Link ⬇️
October 24, 2025 at 7:58 PM
#BkDk #BakuDeku #SapThread (Ancient AU)

In the land of Onah, everyone is more than their secondary gender.

Under King Katsuki's rule, his people are fortunate. Everyone has a home, full bellies, and access to education no matter their status.

He even allows omegas in his vast military.
October 21, 2025 at 10:27 PM
It's a lovely Monday!! Time to reveal what I'm working on this week.

(FYI, No 🧵s on Sat until the anime wraps😂)

Okay, here's the BkDk✍️ Schedule

Tu: Hano's Ancient AU🧵
Wed: Shi 🎃Collab (Patreon)
Fr: Embers FINALE (Ao3)
Sun: Wedding Escape Finale (If goal is reached)🧵
October 20, 2025 at 4:02 PM
#BakuDeku #BkDk #SapThread (A/B/O Wedding Escape) Pt3

Bird Boy steps into their village three years ago.

The extras say the beta's funny. Charming. A guy who would 'be a great father' for his mate. Some even say he's 'cute'.

He's also madly in love with Izuku. Katsuki HATES Bird Brain.
October 19, 2025 at 4:30 PM
As if this weekend could be any MORE hype, we're in the last 'official' chapter of Ember (though I really think the last chapter is more than just a catch up)

But here we go!

Title: The Ember Between Us
Rating: Ex
Main Pair: BkDk (others in tags)
Chapter: 20/21

Link ⬇️
October 17, 2025 at 8:08 PM
"Deku, let's make a pinky promise."

Six-year-old Izuku looks up from the herb he's cataloguing, blinking at the young hunter. "Pinky promise? For what?"

Red eyes stare him down, holding the mentioned finger up. "That when we're old enough, you'll be my bride."

#BakuDeku #BkDk #SapThread
October 15, 2025 at 12:03 AM
First of all, big happy birthday to Gabs! Go give her some happy birthday wishes 🥳And Embers is almost done!

Okay, here's the BkDk✍️ Schedule

Tu: Gab's birthday 🧵
Wed: Libahunt Excerpt (Patreon)
Th: Sneak peek Embers (Patreon)
Fr: Embers Ch20 (Ao3)
Sat: Wedding Escape 🧵Pt3
October 13, 2025 at 3:59 PM
#BkDk #BakuDeku #SapThread (Singer/Dad AU)

"Dad, this is so cool!"

Izuku tries not to preen as his daughter tugs his sleeve, hopping in her spot as she giggles.

Yes, the line's long. The tickets expensive. And he's got a ton of ungraded quizzes on his desk.

But for Eri, it's worth it.
October 12, 2025 at 12:51 AM
I know a lot of people are avoiding Twitter because of the upcoming episode, but I hope everyone remembers there's a new Embers chapter today!

We're down to two chapters after this!

Title: The Ember Between Us
Rating: Ex
Main Pair: BkDk (others in tags)
Chapter: 19/21

Link ⬇️
October 10, 2025 at 7:09 PM
"Katsuki, you sly wolf!" Flat Face laughs, tossing a long arm around Katsuki's shoulders. It nearly knocks him over. "I never thought I'd see the day you pulled the alpha card."

"Of course he did," Pinky says, shrugging. "It's Izuku."

#BakuDeku #BkDk #SapThread (A/B/O Wedding Escape) Pt2
October 8, 2025 at 10:41 PM