My Baby Brother is the Strongest Character MASTERLIST
Featuring:
isekaid!older sister!Reader & younger brother!Gun Park
reverse harem
Goo Kim, James Lee/DG, Samuel Seo, Gitae Kim, Jake Kim, Jichang Kwak
other love interests
Jinrang (Lang Jin), Seongji Yuk
Synopsis:
If God is real, then He has one hell of a sense of humor.
Life hasn’t been perfect. There were ups and downs, times where you wished you were born as someone else, someone prettier or richer or more talented, but you had reached a point where you were content. Happy, even. A promotion abroad, a new apartment with no roommates, delicious paychecks and what does the Big Guy do? He kills you. What’s more pathetic is that you died choking on chicken skin while celebrating your new life of independence.
Just when you were an official, proper, working adult of society, the universe spat in your face and now you were back to square one.
No, scratch that, you didn’t regress—you reincarnated as the only known daughter of a yakuza boss. Sounds fancy, you know, but this is no romance manga. Actually, it’s somehow worse, because your baby brother is the infamous Gun Park.
Your Character Settings: AFAB, older half-sister of Gun Park, civilian, medical professional
Content/Trigger Warnings: swearing, typical Lookism violence, sexual themes, mind the warnings for individual chapters
Other Tags: slice of life, isekai, reincarnation/rebirth, sister complex, reverse harem/why choose, fluff, comedy, humor
💋 : smut (from mild to explicit)
AO3, Quotev
Author's Note: There is no deep plot to this. This is just fluffy family stuff with Gun Park being protective of you, his older sister and a magnet for hot weirdos. There is some occasional smut. NO BROTHER-SISTER INCEST. Also, some ages have been lifted.
IMPORTANT: I started this AU during the early chapters of the Incheon arc. Back then, we didn't know who Gitae Kim's mother was. But after some deliberation, I've decided to acknowledge that part of canon within my AU so there is second cousin incest within the story between Gitae and Reader.
Lastly, don't overthink. Just enjoy the ride.
Episodes:
First Meeting
You've been reincarnated and now you have a weirdo younger brother.
Games
Gun has a special place in his heart for toys and puzzles.
Birthday
Goo shows up unannounced after Gun missed a work meeting.
Angel of J High (featuring: the J High first years)
You've grown accustomed to your life as the school nurse for J High.
It's a Promise (featuring: James Lee/DG)
A forgotten promise comes back to haunt you.
Swift Waters Parted
It's the day of the festival, but why do you feel like you're forgetting something?
Morning Sun (featuring: Samuel Seo) 💋
You meet up with a friend for drinks.
Safe and Sound
You and Gun finally share a meal again.
Weirdo (featuring: Goo Kim)
Gun Park has been acting weird and Goo will get to the bottom of it!
Like Water for Chocolate (featuring: Gitae Kim)💋
Once upon a time in Mexico...
Paper Snow, Glittering Fish
Gun reminisces about his two very different experiences with Mother's Day.
Scammers and Strange Fellows (featuring: Goo Kim)
You have a word with the man who tries to scam your students.
Like Tears in the Rain (featuring: Jake Kim)
A near chicken skin fatality leads to a fateful encounter.
Kryptonite (featuring: James Lee/DG)
You struggle to find a gift for your brother so you rope in a "former" admirer for help.
Bert and Ernie (featuring: Goo Kim)
The tension in Goo and Gun's friendship reaches its boiling point.
Morning After (featuring: Samuel Seo, Goo Kim)
Samuel doesn't do breakfast buffets, but then the elevator greets him with an unexpected surprise.
Trip to Busan (featuring: Goo Kim, Busan Gang and Lang Jin/Jinrang)
Gun accompanies you to Busan for a medical mission, and where Archie goes Jughead follows.
Noah's Ark (Gun-focused but with minor Goo Kim x Reader)
One fishing trip changes the course of history.
Anchor
The bad days come and go like the tide, but luckily, you found your anchor.
Fish Out of Water (featuring: Seongji Yuk and his students, Samuel Seo)
Seongji Yuk and his students visit Seoul for the first time.
Fire! (featuring: Samuel Seo)
Your house catches fire, forcing you to relocate.
Alibi in Ashes (featuring: Samuel Seo, James Lee/DG, Goo Kim)
(Direct continuation of "Fire!")
Life goes on after your house is set ablaze, but the culprit maybe closer than you think.
Out of the Frying Pan (featuring: Samuel Seo, James Lee/DG, Goo Kim)
(Direct continuation of "Alibi in Ashes")
You confront the so-called arsonist.
Stupid Piece Of (featuring: Samuel Seo)
A glimpse into Samuel Seo's devotion.
If I Love You, Beware (featuring: Gitae Kim, James Lee/DG) 💋
Gitae Kim's hunger remains unsatiated and he doesn't understand why.
So This Is Love (featuring: Gun Park, Jake Kim, James Lee/DG, Gitae Kim) 💋
You encounter an old acquaintance while doing a favor for your senior.
Lovefool (featuring: Gitae Kim, James Lee/DG) 💋
(Direct continuation of "So This Is Love")
You finally get a whole day to yourself. No boys, no drama. Or so you thought.
Haunted (featuring: Gitae Kim, James Lee/DG) 💋
(Direct continuation of "Lovefool")
What's worse than one persistent freak?
Second Puberty (featuring: James Lee/DG, Gitae Kim, Gun Park, Goo Kim)
(Direct continuation of "Haunted")
DG forces you to stop looking away, Gitae Kim is a surprisingly decent conversation partner and Goo Kim realizes something.
Tempting Fate (feauturing: Jake Kim, Samuel Seo)
Jake Kim invites you for a drink.
Better Than Candy (featuring: James Lee/DG) 💋
You're right, he can't keep sucking on lollipops forever.
The One That Got Away (featuring: Jichang Kwak) 💋
The girls ask you for relationship advice.
The Lost Lenore (featuring: Samuel Seo, Jake Kim, Big Deal)
You reunite with your childhood friends.
Manwhore, Maneater (featuring: Gitae Kim) 💋
Gitae Kim shows up with an offer you can't refuse.
My Best Friend's Sister (featuring: Gun Park, Goo Kim)
Goo is practically family.
Old Flame (featuring: Gun Park, Goo Kim, Jichang Kwak) 💋
You spend Thanksgiving in Chungcheong and run into a familiar face.
Burn Marks (featuring: Gun Park, Goo Kim, Jichang Kwak)
(Direct continuation of "Old Flame")
Is love really enough to fight fate?
Sparks Fly (featuring: Gun Park, Goo Kim, Jichang Kwak)
(Direct continuation of "Burn Marks")
Jibeom wants his brunch to be as entertaining as an episode from Sex and the City.
No Need for Goodbyes (featuring: Gun Park, Goo Kim, Jichang Kwak)
(Direct continuation of "Sparks Fly")
You leave for Seoul and Jichang rethinks his life.
Bonus Content:
Timeline explanation
Incest
smut scenarios with the men of the harem (James Lee/Diego Kang, Samuel Seo, Jake Kim, Gitae Kim, Goo Kim) 💋
NSFW Alphabet: Gitae Kim💋
“Uh, I like noses. I like big noses because well, because you can kind of like, you can like sit on them.” – Doja Cat, 2021
NSFW Alphabet: James Lee/DG💋
NSFW Alphabet: Samuel Seo 💋
Love Languages with Younger Brother! Gun Park
A fluff-filled exploration on how Gun Park communicates his affection for you, his older sister.
What if...
MBBITSC! Gun Park switched consciousness with canon!Gun
You're reborn in the Pre-Generation (masterlist)
You ended up in Korea at age 8. (ask/discussion)
You had a son with Gitae Kim (masterlist)
Twins with Jake and Samuel
You were in a sorta love triangle with Gap Kim and Minseon Kang
Main AU Fanart:
Noona 1, 2 by @lollipoplolly33
Noona by @qcup1ds-stuff
My art:
Gun, did you miss me?
Goo and you dancing
Disclaimer: The image used does not belong to me. It is a screencapture from Ep. 505 - Lookism, Webtoon.
CONTENT WARNING: This post contains mild suggestive themes.
JAMES LEE
James notices it within exactly two seconds of you walking into the living room.
He says nothing. But you've managed to distract him.
His eyes trace the soft outline beneath your oversized tee.
He will play it incredibly cool.
He’ll sit back on the couch, crossing his legs, but his eyes will track your every movement as you stretch over the coffee table to grab the remote.
When you sit next to him, he casually drapes his arm over the back of the sofa, but his fingers gently hook into the collar of your tee, pulling you against him.
"You seem comfortable."
"Is that a problem?"
"Quite the opposite."
GUN PARK
The moment you walk past him in a thin, bra-less tank top, his eyes instantly fixate on the subtle bounce and the distinct outline of your nipples pressing against the fabric.
He stares right at them.
"You do know that they exist for support, right?"
"But they're a pain in the... chest?"
Gun smirks.
But as soon as the bell rings or you need to step out, he will literally take whatever oversized hoodie or jacket he’s currently wearing, toss it over your head like a blanket, and tell you to put it on.
If you complain that it’s uncomfortable, he’ll just glare.
"Only I get to see you like this, understood?".
GOO KIM
Goo is sitting on the floor playing a video game when you walk by to grab a snack.
He accidentally catches a glimpse of the unmistakable shape beneath your shirt, completely misses a combo, and the screen loudly blares GAME OVER.
He drops the controller, his jaw hitting the floor as his glasses slide right down the bridge of his nose.
"Are we... are we just letting the girls breathe today? What's the occasion?!"
"Shut tf up, Goo. I'm just feeling hot."
"..."
"Stop staring weirdo."
"Baby I'm trying, really! But they're staring back at me."
JOHAN SEONG
He’s sitting on your bed, trying to fix a strap on his bag, when you sit down right across from him in a loose, baggy pajama top.
As soon as he catches sight of it, his face goes full on medical emergency mode.
He violently snaps his head to the side and stared aggressively at the wall.
"Everything alright Johan?"
"JOHAN! ARE YOU OKAY-"
Buddy's literally having a nosebleed.
"Johan, calm down! It's just my pajamas; besides we're at home."
After you clean him up, he gets extremely touchy.
Wrapping his arms around your waist while you cook. Or constantly touching you while you guys sit on the couch watching movies.
SAMUEL SEO
He’s pouring himself a glass of water when you walk into the kitchen.
His eyes immediately lock onto your chest,
He sets the glass down with a heavy thud. He moves towards you.
"Are you doing this on purpose?"
"Why is something wrong?"
His eyes drop to your chest.
"Ohhhh. I don't think this should be a problem. You walk around like this all the time-"
He doesn't let you complete the sentence.
He hooks his fingers under the hem of your shirt, lifting it just enough to see your boobs.
"Smart choice. Saves me the trouble of taking it off later."
DANIEL PARK (OG)
Poor, sweet Daniel.
You two are sitting on the floor studying when you stretch your arms over your head, lifting your shirt just enough to show that you're completely free underneath.
Daniel looks up, sees the distinct movement, and his eyes go wiiiiide.
He lets out a high-pitched squeak, as his hands fly up to cover his face.
"Y/N! Oh my gosh, I'm so sorry! I didn't mean to look, I swear!"
He’s currently sweating through his clothes because he doesn't know where to look.
Even after you laugh and tell him it’s fine, he keeps his eyes glued strictly to his textbook, his fingers trembling as he turns the pages.
He keeps stealing tiny glances when he thinks you aren't looking, his heart beating so loud you can practically hear it.
JAKE KIM
Jake’s lying on the bed when you walk in, and the second he notices your bra-less look
A slow, incredibly fond grin spreads across his face.
He opens his arms wide, patting the empty spot on his chest.
"Come here the love of my life."
The moment you slide into his embrace, he wraps his large arms securely around your back, his hands sliding under your shirt to press directly against your bare skin.
He lets out a contented sigh, burying his face in your hair.
"I love it when you're this relaxed around me. Makes me feel like you're officially all mine."
