It Was a Mistake, Grand Duke! Novel

Naver Series

### Alternate names

대공님, 실수였어요!, Daegongnim, silsuyeosseoyo!, Grand Duke, It Was a Mistake!, お許しください、大公様！, 大公殿下，这是个误会, 大公爵，我不是故意的！, แกรนด์ดยุกขา อย่าถือสาข้าเลย, แกรนด์ดยุค มันเป็นความผิดพลาด!, Tuan duke, itu adalah kesalahan!, ¡Gran duque, todo fue un error!, Grand duc, c'était une erreur !, Grand duc, c'était une erreur!, Grão duque, foi tudo um erro!, Đại công tước ~ đó là một sai lầm!, Đại công tước, đó chỉ là sai lầm!, Повелитель, это была ошибка!, Эрцгерцог, это была ошибка!, !الدوق الأكبر ، لقد كان خطأ

### Genre

Romance, Translated Romance, Fantasy Romance

### Korean chapters

105
5 Free Chapters

### Korean release

September 3, 2019

**It Was a Mistake, Grand Duke!** was a romance web novel created by Sisse, illustrated by 조이뿅 (Joypyonn) and officially licensed and published on YONDER; it concluded on February 19, 2023. The original Korean web novel premiered on Naver Web Novel and concluded on March 10, 2020 and side story premiered on March 14 and concluded on March 21, 2020 and special side story simulcasted and concluded on September 14, 2021.

There is a Webtoon adaption of the series.

## Synopsis

*Vivian has been crushing on the handsome Grand Duke Glenn for seven years. She's content to simply watch him from afar...until she finds him in her bed, tied up and half-naked!*

Vivian Louis is 21 years old and knows she should be thinking about marriage, but she'd rather spend the rest of her life fangirling over the man of her dreams, Grand Duke Lennox Elphidion Glenn. That being said, she knows he's way out of her league. So imagine her surprise when she wakes up one day and finds Lennox tied to her bed!

What's more, he says Vivian was the one who kidnapped him, although she doesn't remember a thing. In order to avoid scandal, Lennox and Vivian agree to pretend to be dating―but why does Lennox seem to want more?

## Chapters

Last updated on **February 19, 2023**
* Ep.1 - The Grand Duke is in My Bedroom
* Ep.2 - Contractual Dating
* Ep.3 - Shall We Begin with a First Kiss
* Ep.4 - Please Don't Be This Way
* Ep.5 - She's My Lover
* Ep.6 - From Today On, We're Dating
* Ep.7 - What Vivian Doesn't Know
* Ep.8 - You're the First
* Ep.9 - I'm Yours
* Ep.10 - I've Been Waiting for a Long Time
* Ep.11 - His First Gifts to Me
* Ep.12 - I'm Going to Catch Her
* Ep.13 - Please Kidnap Me
* Ep.14 - I'm in the Grand Duke's Bedroom
* Ep.15 - My Future Daughter-in-Law Is So C...
* Ep.16 - Are You Going to Eat Me Up
* Ep.17 - Keep Her by His Side, No Matter W...
* Ep.18 - I Think My Feelings for Him Are Gro...
* Ep.19 - A Perilous Meeting of the In-Laws
* Ep.20 - I'm Serious about Her
* Ep.21 - I Think I'm Going to Be Lovesick
* Ep.22 - The Cutest and Most Dangerous in...
* Ep.23 - Tell Me How You Really Feel
* Ep.24 - What Happened at the Lake
* Ep.25 - A Dangerous Man
* Ep.26 - Sweeter than Chocolate
* Ep.27 - I'm the Grand Duke's and He's Mine
* Ep.28 - One Step Closer
* Ep.29 - I'll Eat You Up Just a Little
* Ep.30 - A Chance Encounter
* Ep.31 - A Jealous Man
* Ep.32 - Shh, Don't Get Caught
* Ep.33 - Starved Beast
* Ep.34 - The Secretive Book Club
* Ep.35 - Full of Gifts, Full of Affection
* Ep.36 - There's Something Fishy about Thi...
* Ep.37 - I Can't Take It Anymore
* Ep.38 - I Won't Give You to Anyone
* Ep.39 - I Want to Tease Him
* Ep.40 - Don't Throw Me Away
* Ep.41 - What Might Be a Storm
* Ep.42 - An Irresistible Woman
* Ep.43 - Along with the Morning Sun
* Ep.44 - I'd Rather Be Naked Than Wear This
* Ep.45 - If You Kiss Me There...
* Ep.46 - The Taste of Love
* Ep.47 - A Smile That Brightens the Heart
* Ep.48 - This Story
* Ep.49 - A Slightly Awkward Situation
* Ep.50 - May I Have This Dance
* Ep.51 - To Your Side at Once
* Ep.52 - I Thought I Would Lose It
* Ep.53 - A Special Dessert?
* Ep.54 - My Strange Life with the In-Laws
* Ep.55 - Put Them On, Grand Duke!
* Ep.56 - Hide and Seek
* Ep.57 - A Quick and Accurate Surprise Att...
* Ep.58 - Because I'm Weak to Temptation
* Ep.59 - Love Makes Fools of Us All
* Ep.60 - At His Gentle Touch
* Ep.61 - Just Like a Jealous Cat
* Ep.62 - The Secret Gift
* Ep.63 - The Happiest Day of My Life
* Ep.64 - Only for You
* Ep.65 - Enchanted by His Beautiful Blue Ey...
* Ep.66 - A Peaceful and Cozy Morning
* Ep.67 - A Dangerous Signal
* Ep.68 - Did I Turn into a Rabbit?
* Ep.69 - A Familliar Feeling from a Strange...
* Ep.70 - Into His Arms Ferociously
* Ep.71 - I'm Never Giving Up
* Ep.72 - The Reason His Heart is Charred
* Ep.73 - I Souldn't Have Opened It
* Ep.74 - You'll Fall in Love with Me Again
* Ep.75 - We Must Get It Back
* Ep.76 - Sneaking In as a Rabbit
* Ep.77 - Don't Even Think About Running
* Ep.78 - Some Things Never Change
* Ep.79 - Tie Me Up
* Ep.80 - Forgiving Is Not Easy
* Ep.81 - I Can't See Anything Else but You
* Ep.82 - A Prude Wouldn't Be Able to Do This
* Ep.83 - What in the World Is Going On Her...
* Ep.84 - Elixir of Love
* Ep.85 - Call Me Master
* Ep.86 - Say What I Need to Say
* Ep.87 - A Step Closer to the Future
* Ep.88 - What Am I Going to Do With You?
* Ep.89 - Something Blue
* Ep.90 - The Wedding of the Century
* Ep.91 - A Special Premonition
* Ep.92 - The First Day of Our Honeymoon
* Ep.93 - All That Glitters in Gold
* Ep.94 - Our Wedding Night, And...
* Ep.95 - Let's Run Away for Now!
* Ep.96 - I Only Realized It Now
* Ep.97 - For as Long as We Both Shall Live
* SS1 - You Are My Joy (1)
* SS2 - You Are My Joy (2)
* SS3 - An Even Greater Happiness (1)
* SS4 - An Even Greater Happiness (2)
* SS5 - My Daughter's Debutante Ball (1)
* SS6 - My Daughter's Debutante Ball (2)
* SS7 - My Daughter's Debutante Ball (3)
* SS8 - My Daughter's Debutante Ball (4)

## Other

### Webtoon

* It Was a Mistake, Grand Duke!: A webtoon of the same name written by Lee Jung-eun and art by Joypyonn and original work by Sisse.

## External Links

* *It Was a Mistake, Grand Duke!* at YONDER (App-only, Chapter 1)
* *대공님, 실수였어요!* at Naver Web Novel (Korean)
* *대공님, 실수였어요!* at Naver Series (Korean, Pay)
* *It Was a Mistake, Grand Duke!* at Anime-Planet
* *It Was a Mistake, Grand Duke!* at Baka-Updates Manga
* *Grand Duke, It Was a Mistake!* at Novel Updates
* *대공님, 실수였어요!* at Namuwiki (Korean)
	+ *Archduke, It Was a Mistake!* at Namuwiki (English machine translation)