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Harmonious Hearts

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Sometimes, opposites don't attract — they collide.

Mitchell Sullivan was supposed to be the ultimate uncomplicated distraction…until Roxy finds out the friends-with-benefits she didn't realize she was falling for is also benefiting from his best friend, Ian Summers.

Ian, who barely tolerates her.
Ian, who watches her like he’s just waiting for her to trip.
Ian, who steps in to protect her when she least expects it—and never quite steps back.

Suddenly, Roxy is entangled in a connection she never sought between two men with a history of their own and a growing interest in her.

Mitch wants more, and Ian wants in, but Roxy doesn’t know who she is when she’s not guarding her heart

Caught between past wounds and a future none of them planned for, Roxy has to decide if she’s brave enough to stop running and strong enough to hold onto something real.

Book One in the Disaster Bi Design series, Harmonious Hearts, is an erotic why choose (MMF) novella with a pretty cover and filthy guts.

115 pages, Kindle Edition

Published December 26, 2024

222 people are currently reading
735 people want to read

About the author

Darby Quinn

3 books28 followers
Darby Quinn writes spicy romances with heart, humor, and heat...emphasis on the heat. With a soft spot for morally gray characters, obsessive MMCs, and villains who get the girl, she crafts stories that will leave you breathless and begging for more.

When she's not writing, Darby is likely drinking a crisp Dr. Pepper, playing cozy video games, and wondering if the new story idea she just had is too wild.

Follow her for more stories that will make you laugh, swoon, blush, and rethink reading in public.

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5 stars
193 (32%)
4 stars
208 (34%)
3 stars
155 (25%)
2 stars
38 (6%)
1 star
9 (1%)
Displaying 1 - 30 of 74 reviews
Profile Image for S.L Gray.
Author 6 books78 followers
January 27, 2025
Oh roxy, you lucky gal you 🙂‍↕️

I absolutely fricken’ LOVED this book.
Only complaint was that I need more, it was perfect to binge read, and will definitely read again.
Profile Image for Rayya O'Reilly.
14 reviews1 follower
April 29, 2025
Well, this was my first time reading this author but I loved every second of it. It was basically 100 pages of pure delightful, hot and heavy, filth. But it was also so much more than that! In such a short span, the author managed to fit in such a range. I swooned, I giggled, I melted, it tugged on my heart and I felt pride for characters we barely knew! Roxy and Ian are two ends of the very same spectrum when it comes to their pain. And they're both criminally misunderstood. The tension between those two was palpable. Mitch was the catalyst and bridge for connecting them. It was a perfect read and I recommend it to everyone who wants a quick and easy, yet extremely fulfilling (and filthy) read mixed with MM action! Oh did i mention, they're both dominant MMCs? If you're thinking about reading it, as Mitch and Ian would both say, stop thinking and just let go. Read it! You won't regret it!
Profile Image for Noomi.
88 reviews1 follower
July 18, 2025
DNF at 17%

I'm sorry, but first of all there was no getting to know the characters or what they even work with (or how they know each other.) And then she gets groped by a bunch of guys and nobody stands up for her or confronts the guys??? Not to even mention that she tells Mitch "no" to sex when she notices he's drunk and he tries to convince her otherwise????

I do not like that, nor that this book has zero plot - I've read fanfiction smut better than this.
Profile Image for Beth Saint-Hilaire.
34 reviews
February 13, 2025
Got really frustrated with this book. It’s mostly spice but there was so much build up about this guy’s large appendage. She must be a snake if she can fit it in her mouth but it was soooo tight elsewhere *eye roll*. Then the MM part at the end was just thrown in for fun? It wasn’t paced right for me.
Profile Image for Allyson Tokar.
5 reviews7 followers
February 13, 2025
Mitch and Ian will forever live with me. I loved the pace of the book and how it started off strong and didn’t let up. Roxy has so many imperfections that both boys fill perfectly. They blend together well and create a sense of warmth and love between them. My only complaint is that I want MORE! I would have loved to have read from months before, the development between Mitch and Roxy and Mitch and Ian and all of their views. On the opposite end I would love to see them after now that they are together in day to day life and the excitement and struggles of their new love triangle.
This entire review has been hidden because of spoilers.
Profile Image for Paige.
151 reviews
February 20, 2025
The internal dialogue of the fmc is bloody hilarious! This is the perfect palate cleanser spicy novella between longer reads and I love it when a book requires 0 of my brain cells to just read. The characters do have a little back story which was nice but the spice was spicing. It can be read in one sitting I just started it at almost midnight 😂

⚔️ MMF bi romance
🌶️ Mostly spice novella
⚔️ Grumpy x sunshine x himbo
🌶️ Healing her trauma
⚔️ Hard dom x Soft dom
🌶️ She’s the grump

It’s available now on KU ❤️
Profile Image for Reading_with_AAron.
181 reviews13 followers
May 22, 2025
In this short, spicy, quick debut read from Darby Quinn, you have Mitch, Ian, and Roxy all trying to figure out the sparks between them. It will all come to a head at Mitch's promotion party and the spice gets hot! 🔥 This is a spice-heavy, low plot book. I loved it and will definitely be reading the next one in the series!
Profile Image for Fiona Rowan.
Author 2 books23 followers
February 21, 2025
Today I learned I’m into ⚔️
Shit this book is straight up filthy, beautiful smut and I loved every minute of it 🥵🥵
Also the author made her own cover?? What the hell? Girl HOW are you so talented?? Can’t wait to read more of your work.
42 reviews
February 22, 2025
Speechless

I've forgotten what words are, I've been left in a puddle on the floor.
This is one of those books with the cutesy covers in the streets and a big hard spice in the sheets!

Profile Image for Kendra Sponsler.
14 reviews
March 7, 2025
And she said there was no plot!

Darby is a liar! This book has plenty of plot (enough to get you in your feels and a little choked up) and ALL of the spice! This love triangle quickly turns into a throuple and it was amazing!
Profile Image for Lilah Melbourne-Kennedy.
48 reviews
March 28, 2025
Wow! For a short and sweet spicy book I wasn't expecting as much story as there was!! I've seen less story in a book that's 500 pages! fab writing, it was enticing and what a perfect way to portray a mix of pain and pleasure that all party's involved enjoy x
Definitely recommend
Profile Image for Justina Bascombe.
234 reviews2 followers
September 6, 2025
spicy

This was both sweet and spicy. Why choose when you can have them both! The MCs all want each other and they finally decide to get there! This was short and spicy.
Profile Image for Rombookfanlove.
300 reviews16 followers
January 19, 2025
3.5/5 rounded up to 4

Short read, novella length and mostly sex but enjoyed the dynamic between the three with their issues to work out and the power dynamics in the bedroom. It was interesting to see Ian and Roxy work out their insecurities before and during the bedroom scenes especially and the dynamic of the two kind of differing dominants, one more assured and one a bit softer. Generally books that are more focused on sex only aren’t my thing so I’m probably not the target audience but it was a fine read.

There’s some errors where sentences are missing a word at the end or things like wrong word form used, which did pop me out of the flow when reading a little.

However, overall a fun, fast, hot little read - if you’re looking for a quickie read with fun dynamics I think this is worth picking up.
Profile Image for Sofia.
1 review
June 7, 2025
A quick, fun, super spicy read! I loved it! Full of spice but also full of heart, made me feel things everywhere!
can't wait for this author's next work!!
Profile Image for Nicole.
12 reviews
January 25, 2025
A quick read that’ll knock your socks off

If I ever thought about writing a book, this is the exact book it would be. It was the exact amount of filth I want in a book. I loved it so much. It was a very quick MMF read (120 pages). The dirty talk starts on page 2. I absolutely fell in love with the characters. 🌶️🌶️🌶️🌶️🌶️/5
It even had a little twist of events toward the beginning, to get the ball rolling, that I didn’t expect. Well done!
Profile Image for Krista.
59 reviews
April 7, 2025
This book is more of a 2.5/2.75 than a 3 star for me. I know this book was more of a "novella", but I thought there was going to be some sort of build up to the sex part. The book was 75% smut, and the pacing just wasn't my cup of tea. I wanted to know more about the characters and it was like the author just wanted to write smut and not an actual story, which is fine, but not what I was expecting this to be.

It was recommended to me when I searched for "sword crossing" MMF books, and even then, there wasn't as much of the MM part as I was expecting. The MM part was minimal, and just kind of thrown in there at the end. They weren't as involved with each other as I wanted them to be. The dirty talk was good, but there were parts that just read cringey to me.

The writing style was very repetitive, using the same words and phrases over and over again to convey the same thing happening. There wasn't a lot of variety in the character movements or dialogue. It was boring for some parts, and took me longer to read than it should have for how short it was.
Profile Image for Robyn Kate.
24 reviews
March 3, 2025
i had an itch and this book did not scratch it. idk i found the writing really cringey. she said something like “jeepers batman” and i’ve never been dryer in my life.
Profile Image for Emily Doll.
123 reviews3 followers
May 26, 2025
I stumbled across this gem as a self rec by the author in a book group. She had posted a little scene snipit that had my attention, and I added it to my TBR!

This is one long spice scene between a really likable group of individuals. We are thrust into a very, already established friends with benefits situation with Roxy and Mitch. Roxy is facing the realization that her no strings attached hookups mean way more to her than just casual releases. Mitch starts another relationship with his male best friend and she feels the turmoil of having no claim to him outside of their current agreement, and her long time insecurities start gnawing at her mind when she sees Ian as not only the annoying coworker she can't stand, but the infectiously likeable guy that is directly her competition. Competition her own demons won't allow her to even consider winning against.

The dynamic changes up pretty quickly when Roxy tries to run from her feelings as soon as she realizes, but Mitch interjects with a request he has been desperately wanting and setting up for some time. The prospect of all three of them... enjoying each other. There is a huge roadblock in the fact that Ian and Roxy have some common ground in their own feelings to find before pursuing the wants of their mutual love for Mitch, but it's quickly settled that they both have strong feelings to acknowledge.

That takes a very short amount of time to all work out before Roxy is being drug off to Mitch's room, and the rest of the book starts, lol! Moving forward is a steamy display of three people finding the love they need for themselves within eachother and the beauty of having a safe space to celebrate the strength in giving over your control to those who truly cherish what that gift means. This is such a spicy book. It's chapter after chapter of their first time together, and you get a taste of absolutely everything. There are so many sentences that are melt worthy. The ways the guys talk to her and praise her and take care of her mental state while no less using her how she needs, all while claiming her in the ways they all need..... drool. I just got lost for a while until we all were exhausted and satisfied, lol.

And to think... this all happened while Mitch was hosting a party in his apartment to celebrate his new work promotion, lol.

This book was filthy spicy fun mixed with some really deep emotional aspects to give our characters some depth. I enjoyed it and am skipping off to book two!
Profile Image for Meagan Grauel.
607 reviews2 followers
September 10, 2025
We’re going to categorize Harmonious Hearts as dark erotica. It’s a very steamy MMF romance novella with strong biromantic elements. And since it’s MMF, yes — the MMCs cross swords. The dynamic here is Grumpy × Sunshine × Himbo, with the FMC as the black cat of the group. Personally, Himbo MMF is one of my favorite setups, and Quinn leans all the way into it.

There isn’t much plot - this novella is essentially chapter after chapter of them all getting dicked down, with the opening couple of chapters serving only as a warm-up before the nonstop spice begins. They work out their feelings through sex, which wouldn’t really fly in the real world, but in fantasy land it makes for a fun, indulgent read. Ideally, they would have talked out their emotions and then jumped into bed, but I can’t exactly complain about characters deciding to hash out their issues while having mind-melting orgasms.

Summary: Harmonious Hearts is pure, unapologetic dark erotica. If you’re looking for heavy plot or emotional depth, this won’t be your book. But if you’re craving relentless spice with a fun MMF dynamic and a cast that feels like trope archetypes come to life, then it’s absolutely worth the read. I gave it 4/5 stars for delivering exactly what it promises: heat, humor, and plenty of himbo energy.
Profile Image for Layy QT.
126 reviews13 followers
May 1, 2025
What a hot, quick and spicy read! Damn, I’m so jealous that I want to be Roxy 🤣

I really liked how the author thought to add a bit of backstory. I just feel like the backstory would have been better before the smut and not during. To me, that just takes away from the moment. When I’m in the “smut zone”, I don’t want to sit and talk about my feelings LMAO. Yet there was enough story and feelings that had me wanting more. I wanted to know Ian and Mitch’s story. I wanted to know how Mitch and Roxy met and how they started, and I’m FERAL to know how my new favorite throuple is doing now that the feelings are all out there!

Let me tell you. It was like “good cop, bad cop” in that bedroom. One degrades her while the other praises her 🥵. There was sword-crossing because hello??? Who doesn’t love that??? There was position changes, deep throating, being used and abused in the most DELICIOUS way…. If that doesn’t convince you to read this, then this isn’t the book for you.

Darby this novella was so deliciously smutty and I can’t wait for your next release! 😍
This entire review has been hidden because of spoilers.
Profile Image for Hannah.
37 reviews
May 19, 2025
Do you ever read a book that is maybe a bit out of what you'd normally reach for, and you're not sure it'll be your thing, then you read it and end up pleasantly surprised? That was this book for me.

Why choose/MMF is very hit or miss with me, I'm not always into it, but I saw this book recommended in a smutty Facebook group and figured I'd give it a try and I'm glad that I did.

It's a super spicy novella with lots of chemistry (I swear my phone was steaming at certain points!) and a dash of vulnerability that got me really invested in the outcome for these characters.

Roxy, Mitchell and Ian just fit together, and that's not always the case with a why choose/MMF romance in my experience, but I was really into how they complimented each other. You get to know the characters a bit but it's not the deep dive you'd get from a full-length novel, yet it doesn't feel like anything is missing.

All in all, this was a good call for me and if you're in the mood for a novella full of spicy times, this is the read for you!
434 reviews
July 27, 2025
1 ⭐️

I’ve read so many why choose/throuple books more spicier and darker than this. But this book sucked. The men played with the fmc, her insecurities and emotions.
4 men literally groped her in front of them and they didn’t do anything, while they claim to love her.
In fact, they prevented her from standing up for herself when she did so, forget actually protecting her and throwing such people out of their house at their party. Like wtf?
They ignore her at their own party for an hour and only notice her as she’s about to leave and after she comes in their line of view. This is after ignoring her for a whole week and never explaining their plan of being a throuple together or anything of the sort. The men are both POS.
The spicy scene wasn’t good either.
Profile Image for Karina.
556 reviews9 followers
April 11, 2025
Honestly, not a ton to critique here! It's 120 pages of mostly spice scenes, taking place over an hour or two within the story timeline, and they are spicy! We get just enough background to understand the characters, but honestly one of the MMCs said the FMC's name halfway through a scene and I was like "umm I thought it was something else, but sure!"

Could have used maybe a little bit more extrapolation or maybe a little more angst between Ian and Roxy to set the scene a little better, and the book itself could have used another quick pass by an editor, but otherwise it was a fun, quick read!
Profile Image for Shan ~A~.
3,179 reviews63 followers
April 24, 2025
Mitchell Sullivan, Ian, & Roxy

I went in expecting spice and I got it, however, I was also expecting a bit more of a fleshed-out story. That was my assumption, and it was incorrect. What we actually have is a moment in the lives of Mitch, Ian, and Roxy. One moment, that evidently their interactions had been leading up to. I just wish we'd gotten the lead in and the aftermath.

Besides the first bit, the remainder is one very long sex scene. It was a good sex scene, and I have to admit they were communicating well before, during, and after about the non-sexual aspects of their connection, especially Ian & Roxy.



Profile Image for Olga Jakubiszak.
68 reviews
January 29, 2025
great steamy smut!

Heartwarming smut is all we really need!
Rox with all the insecurities and head full of worries, I think we all can relate.
Really filthy, spicy and sooooo hot! But also made me so, so happy and cozy! Rare those days
Seems like one night stand story but I feel like I know Roxy pretty well by now.
Appreciate the writing tho, I couldn’t tell the difference between „small” indie author than the „big” one with many books published already!
So I can’t wait to read something else from you Darby!
Profile Image for Ana.
436 reviews5 followers
February 27, 2025
“If a bit of corruption is the price I have to pay to be with you, then I’ll pay it tenfold. I’ll give you my soul…even if I have to shove it down your fucking throat.”

EVERYTHING ABOUT THIS BOOK IS PERFECTION!! I love the cover and the all the characters. I love how the smut was the plot! This was a quick and spicy read, a perfect palate cleanser. I really really liked how Mitch and Ian helped heal a part of Roxy through lots of good spice hehe. The tension and chemistry was perfect between the three of them. There were lots of spicy quotes I highlighted!! I can't wait for Darby Quinn's next book!
Displaying 1 - 30 of 74 reviews

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