#sibling!onf

Your brother pick you up from your tuition centre. Its just a few blocks away from bus stop and you get off after 2 stops.

On the way to the bus stop Hyojin spotted his favourite snack shop was open or, you two stopped by convenient store for a light snack before dinner.

You got something different than Hyojin's maybe instant hotteok or hobbang. You two are walking side by side as both of your chomping down the food in your hands.

And then you noticed your brother stopped and calling you out with muffled noises.

n 

OMG I AM VERY VERY LOOKING FORWARD TO WRITE THIS PART!!!!!

Either you are related from Yuto or Minkyun side and either one of them later joined the family. Confusing? OK example you are Yuto’s sibling by blood and then later Minkyun joined. Or in reversed, Yuto joined later.

1. You are the youngest sibling (could be in terms age when the family comes together or you being born later OR stand in of Yuto’s youngest sister)

2. You are the middle sibling, being either Yuto’s elder blood sibling or Minkyun’s younger sibling but is older than Yuto.

3. Or you are the eldest (Good luck if you do lol there will be a lot of face palming), and alot of  “Yuto, I thought you are on my side????”

Any scenario that is suitable to your own imagination. Also there will be some repeated ideas from first universe because i would like to keep characterization consistency.

Btw this pair of sibling would be one of the noisiest.

My recommendation, you are the middle sibling. But you can totally imagine that your are younger ones. I will try to elaborate both, I hope i won’t confuse you guys🙈

Also age recommendations, Minkyun born in 1995 while Yuto is 1999, so if you are the middle sibling, your birth year is at between.  I would prefer as 1997 or 1998. Preferable that 1997 born if you are Yuto’s sibling, while 1998 born if you are Minkyun’s. 

 If you are the youngest, either you are same age as Yuto but later birthdate or the 3rd child that born after your parents marriage, in this case, 2 years younger than Yuto and 6 years younger than Minkyun.

Heads up I mentioned in the Hyojin & E-tion household, 3 households in this universe are very close to each other.So, apologies in advance and by all means there is not explicit favoritism (I did wrote about household interacting for previous universes). It just convenient and i felt we can use it this way.  Also, Minseok is Yuto’s classmate.

General headcanons

Yuto family moved to Korea when he is still a toddler. So he speaks Korean outside and Japanese back home. Because his family speaks in Kansai dialect, Yuto picks up that dialect automatically

Of course it could be Yuto’s family moved to Korea when he is at middle school age as well, it can be flexible.

Minkyun struggling to learn Japanese but then give up. But it never stops him to randomly drops in weird Japanese when he is hyper, and then leaving Yuto （and you）facepalming because Minkyun used it wrongly

Actually even though mature but super sensitive brothers. Well in very different ways. But should you live with them long enough, you pick up that intuitively 

I dont think this family will have alot of fight because both are sensitive in nature and deeply scare to hurt each other. So this family is all about giving out mental security to family members as well.

(its very different from MInseok Yuto household, because them 2 are in same age, so there is less factor to consider, while Yuto would have to put in Minkyun being a hyung when he started to get used to Minkyun’s existence. And Minkyun will sometimes, not in a bad way, being to passionately and freeminded hoping the younger one to open up more)

I mean, Yuto is defo the tsundere one while Minkyun radiates big puppy energy for this pair chemistry.

Loud

Bonus, Yuto never knew Minkyun can be that clingy lol XD

Minkyun never knew Yuto can be such a fan towards his weird antics XD He thought Yuto wont get his joke due to cultural differences, but turns out Yuto loves it (well cause mostly is body gag/ mom gaegu, like you see what Minkyun did during his birthday’s mini game heaven in 2020, that suddenly motor engine starting? Ya that is total epic lol )

Its super harmonious? like this family combi does not shy away on expressing hey i need help and family members super volunteer to help out if needed. (not that i mean other family does not help out each other, but this one is particularly doing it with super high tendency)

Due to Japanese background, Yuto might try to settle things on his own, but Minkyun will break that mindset stereotype and helps him out (like why you think it is a hassle for me? Ask for help if needed that is what family is here for.)

Minkyun playing guitar while singing and that is how your family know if he is at home or not.

Yeap in this universe Minkyun is a songwriter while Yuto is a dance coach and dancer (later when they all grow up, BTW i am thinking that Yuto and Minseok runs a dance academy later on.)

Minkyun is also part time sponsor/volunteer at pet shelter. In the end you and Yuto also are familiar faces at the spot. 

Also, hanging out being little part timers at Baskin Robbins lol

OH IF WANNA TRULY LINK EVERYTHING FOR UNIVERSE 3, BASKIN ROBBINS being the main meetup/setup point.  Jaeyoung is Minkyun’s friend so he would always drop by to have ice cream. While Changyoon could be doing a part time job there before and while occasionally drop by when he is nearby. 

welp they all live in the neighbourhood/same city in this universe so they all coincidentally bump at each other very often.

Either Yuto joining a school dance club or a dance academy  so there is where he met Minseok. (Who is a really curious kid who also look up to Yuto and Yuto also look up to him, cos dance talents)

(for this part I wont be talking about how Minkyun snuggling cat snacks cos its repeating what I wrote.)

(Gosh I am really bad at naming titles🤦🏻‍♀️)

Hyojin

Sharing food? Yes but rarely the first bite. First bite or first sip are very rare, only when his impulsiveness does not get over his head lol.

What always happen is when the food is served, he will be the first one, quickest one to grab fork/spoon and had the first bite instantly

Then he only remembers you are there, so you will have the second bite lol

Maybe a part of him feeling sorry even if you tell him is ok you don't mind because you understands his love for food.

He will later feeding you affectionately. And keep on telling to eat more.

If you love food too, it will a blessing for him because he found someone who can relate with him

But weirdly, he will offer you his drink for the first sip occasionally. But then you knew he always gets the usual drink so you won't ask for a sip after some time

Normally you would want to ask his permission for a bit or sip. Unless in the course of relationship/friendship he did tell you to drop the permission asking, then you can go on without it. Normally he won't mind much once he got comfortable with you.

But, be prepared, since his love and curiosity for food in enormous he will also ask if I can have a bite/sip a lot.

Friendly reminder, when it comes to food, don't use it as prank material.

E-tion

Defo scoop and let you have the first bite.

In sharing food, his shy nature mostly made him quietly scoops some food of his and calls you out once he is done, with a hand under the spoon/fork preventing food to fall over the table/clothes

Lowkey tries to help you to cool down the food by blowing towards it

Smiley eyes while seeing you munching

Smiley eyes while munching when you try to feed him your food

The type to have larger reaction if the food/drink is tasty and keep insist you to try it.

If uts homecook food from him, the type to only start eating/drinking again when you tell him its nice/after you have swallowed your food

You only ask once for permission for a bite/sip then he will tell you to drop it. Since then you never asked.

Won't always initiate asking you if he can has a taste of yours, but if you knew him long enough, you will be the one offering him.

J-US

The one who will prank you with food. Acting like wanna feed you and even get your hopes high by saying aaaahh then brakes and u turn, the food is now in his mouth

Feeds you. Also love it when you feed him

But first bite and first sip are always you.

The type to share/more like giveaway best part of food without any word. If you return the food, he will look at you halfly swearing with his eyes

Let say you two ordered pasta with different flavour, he will take a plate and portioned half of his then push the plate to you. And you will do the same.

You never really need to ask if you can have a bite or sip. He will always let you have it by asking if you wanna try before you could ask. And if you are his S/O or siblings, no need to ask, he won't mind.

Will ask you if he can has a bite/sip of your food. When you are scooping the food he is there waiting his mouth open.

I think he will also make some comment about the food and comparing opinions with you.

Mostly spicy food are his favourites , if you cannot handle spicy, you won't be tasting his food often. So i think he will just share small portion to you just for a sample. He won't make/force you eat spicy food

Wyatt

First bite and first sip always are yours specifically

He is most happy when he sees your eyes glittering while munching and the food is nice

Keep insisting you to eat more if he felt you liked the food

Feeds you yes, but not often norm basis. He would cut/portion out a small bit of his food and put it at your plate and non chalantly offering you to taste it.

Won't and seldom ask you to feed him a bite of your food. You can to initiate it, he doesn't hate it. Just scoop up and then calls out his name for his attention. He would eat it and later gives you a thumb up.

Another member that you can have a bite /sip of the food/drink without permission. He won't mind if its his S/O or siblings. If you do ask, he will ruffle your hair and tells you to drop it because your being silly and overthinking.

Also another member to make comment on the food. Especially if you two had taste the similar food at somewhere else.

Very welcome if you introduce him favourite food of yours, will try to understand why you like the flavour alot. Of course, pranking him with weird food and lying that you liked it is a no no.

MK

Another member who will take the first bite impulsively lol. He meant no harm or bad intentions. Its just he is happy that he gets to eat

I think you will need to prepared. Even though being s/o or sibling, he will still reject you if you try to feed him. Reasons could be anything. He does not like the food as much as he thought or maybe he just wanted you to have for your own. So don't get pissed when he rejects you.

Will share his food/drink. Calling your name softly and offers you to eat it.

Oh. Another member who doesn't mind if you take a bite and sip of his food.

Smiles while looking at you when you eating his home cook food.

Will always introduce you his new time favourite food. Never shy away to tell you why he liked it so much.

With Minkyun. I do see you two pranking each other by biting a big portion or drink more than just one sip,nearly finishing the food. But you two are OK with it because you both know there is no bad intentions.

U

Shares his food, often.

First bite and sip are yours. He won't feed you first bite, more like he offers you to take the portion first.

Feeds you, like Changyoon, calls your name and then you see him already ready to feed you.

But sometimes will reject your offer. Again reason might be he want you to have it all for yourself. Unlike Minkyun he won't say oh no I am fine. He will say no no you have it.

But the brightest smile when he sees you attempting to feed him a portion of your food.

Will ask your permission for a bite/sip. He actually does not mind if you do not ask him. But you would still ask for his permission if you wanted to sample his food/drink

Would bring you to have japanese food,especially Osaka hearty food. Looks at you when you eat and curious if the food/drink suits your taste

Bonus

Laun

Defo first bite and first sip is yours. Even if its his food/drink, if you do ask before he gets to taste it, he will still let you have it.

Smile widens even more if its tasty

Because of his attentive nature, he will feed you alot until you tell him to eat. In return, you feed him alot too.

Also the first time he attempted to feed he was so shy and timid because he does not know if he did it right. To him it was somewhat significant if you are his S/O

Another member that does not need permission if you wanna have a bite because you are curious

Here is one on how will it looks like when Hyojin feeds you. It was far away from you and asked him to grab one for you. As you reach out to take it he just pushes your hand away and tries to feed you.

Doable for Sibling Au and S/O ONF or BF!ONF

Also I will integrate this to the Senpai AU/University AU where (optional : you and Hyojin grow up in the neighbourhood and) you low-key have a big crush on him ever since high school

Could be you are thinking he treat you as a younger sibling but sometimes would do something that make your heart skips (feeding you like above and more so if you are the type that is weak against gestures like this) so you are in existential crisis mostly everyday.

Your brothers waiting for you to walk you home (J-US and/or MK version)

You normally take the bus or train to work or school.

That day you had to attend some dinner (maybe your superior retire dinner or your uni professor retiring)

You did inform your family through group chat. Then your brother immediately DM you volunteering to pick you up from station. You mentioned its just a 15 minutes walk from station to home and you promised not to be too late

But as you superior/professor favourite, you cannot bring yourself to leave the event early. So you stayed for a bit but did not attend the second round.

Again you notify you family members about it. Your brother requested you to notify him once you get into the bus/train.

The moment you reached your station its already 12.30am. And you see your brother standing on the street waiting for you

He hasn't noticed you yet because he was looking at the other part of station entrance

You do kinda worried because you end up being late. (If you are a younger sibling)

And then they noticed you and immediately break into a warm welcome home smile.

Should you are working they will go "Gosaeng hesseo"

Should both of your brothers came from home to fetch you (sibling au universe version), Minkyun noticed you and pats on Seungjun's shoulder to notify him. Then both of them rushed towards you.

You thanked your sibling for waiting you and picking you up. They might shove a mini hot pack into your hands to fight off the cold weather

Probably Seungjun in a worried tone: Did you had alcohol?

Minkyun would be offering to take your belongings while on the way home.

You and your sibling get to talk about how did the day goes.

Bonus

Seungjun : Hey let's race back home

You probably : ok but wait for me to take my heels off

Setting : Hyojin × Minkyun household (universe 2), you are the youngest (could be the sibling that born later), Seungjun your elder brother's bff. You can check sibling au by browsing masterlist.

Mini headcanons below

Your parents headed for outstation work leaving you 3 at home. They are not worried because your elder brothers are grown up and you are not a toddler or a young child anymore.

You have activities after school/ class in University, maybe a brief shift meeting at part time job so today you are heading home later than usual.

Even though in the family sibling group chat, your brothers volunteered to prepare dinner, you thought they were joking. Because normally they would order fast food for dinner because mum's not in.

You reached home, the moment you opened the door, you saw a familiar pair of sneakers that does not belong to Hyojin nor Minkyun

You could hear 3 familiar voices coming from the kitchen so you head over to the spot once you took of your shoes.

And then you see the images above, your elder brother standing in between his best friend and his younger brother, watching them amazed.

The moment you stepped in, they raise their heads immediately,

Hyojin: oh, you're back. We are making dinner

Minkyun : Are you hungry ?

Seungjun : Hi, Y/N!

Could be that Seungjun is alone today because his parents are at his sister's place.

Seeing Seungjun is the one holding the frying pan, its easy to tell that your elder brother called his friend for help.

Also Minkyun telling you not to worry and they got it handled, also he insists you to leave your belongings in your room first before joining.

You kind of hesitated but the boys insisted you to go wash up before dinner is ready. Seungjun assuring you that they will be fine before you headed to the stairs up to your room.

As you are walking up stairs you could hear both Hyojin and Seungjun yelling at Minkyun for his clumsiness but it's a small matter because they later broke into laughter.

Dinner is ready by the time you head down to join them. They just finished plating and Hyojin was in the middle of typing message to tell you to come down from your room.

You 4 sit down and starts to have dinner.

It was unexpectedly delicious, they are proud of themselves.

Hyojin : we should do this more often

Minkyun is taking a picture and sending them to your parents

While Seungjun is nagging at your brothers that fast food is bad.

We will be heading to universe 3!!!!! (Still have a long way to complete this series as there are 21 pairing)

Either you are related from Hyojin or Changyoon side and either one of them later joined the family. Confusing? OK example you are Hyojin’s sibling by blood and then later Changyoon joined. Or in reversed, Hyojin was the one who joined later.

Or You are the youngest sibling (could be in terms age when the family comes together or you being born later)

Or, You are the eldest, as stand in for Hyojin’s elder sister, or Changyoon’s elder brother.

Any scenario that is suitable to your own imagination. Also there will be some repeated ideas from first universe because i would like to keep characterization consistency.

Btw this pair of sibling would be quiet but noisy unless they are triggered. But if you are their sibling, you might have already kinda used to the noise.

*For Hyo-tion, I will not be doing recommendation *winks

BUT!!! IT WILL BE FUN TO HAVE THIS DUO TO BE CLASSMATE TURNED SIBLINGS. To elaborate, Changyoon was transferred from Jeonju to Seoul some years ago, and then enrolled to the same high school/college class with Hyojin.

*ONE BONUS IDEA WHICH I AM NOT GOING TO ELABORATE, WOULD BE HYOJIN’S ELDER SIBLING AND CHANGYOON’S ELDER SIBLING GETTING MARRIED AND THEY BECOME IN-LAWS LOL 

Also, this family is close with the other 2 families that sharing the same universe. You can check masterlist to see which other families are in universe 3 here 

Ok lets go to some common headcanons (Also apply with you being the eldest)

They might need a bit of time, because suddenly they had to live in a household. Both are looking headstrong on the outside but also sensitive in nature.

(As food is important based on them both in recent interviews and Changyoon’s “we need to eat so that we could live.” ) THEIR USUAL GREETING TOWARDS EACH OTHER IS : “HAVE YOU EATEN?”

Frequently, non nonchalantly asking each other if wanna eat out

If you are related to Hyojin, should Changyoon finds a nice Jeonju cuisine restaurant, he would bring Hyojin and you over to try it out.

To elaborate it further, Changyoon will bring you and Hyojin around when the new family first visited Jeonju. It could be Hyojin suggested Changyoon to do that so that he can know more about his new brother. 

They act like being distant acquainted friends with siblings status recognised by the law, but actually both are very observant and caring towards each other.

You might worry if your brothers cannot get along well because they seems to be interacting less. But actually your worry is just overthinking.

Changyoon might be a bit intimidated by Hyojin because of his temper when Seungjoon teasing the latter. 

And Hyojin might felt Changyoon is a very distant person who prefers to be alone. But we all know Changyoon is just a bit timid when it comes to getting know/ approaching one step further with new people. So both are not a lone wolf type. With Hyojin being observant, he will absolutely stand back and let the other party to come when their more comfortable.

With INFP Changyoon and ISFJ Hyojin, It is not like they are not good at expressing sibling affection towards each other, they just don’t attach to the overly clingly brothers mode because they are more practical in my opinion. They tend to show each other they care by supporting each other, talking about deeper topics and remembering small details. 

Teasing and joking will be there (boys will be boys) but it is kept to the minimum.

(BTW depending on some sources Hyojin is ISFJ and ESFJ both are from some random variety show snippets, as from IDOL WORKSHOP where members mentioned Hyojin like to stay indoors, I will irresponsibly conclude him as ISFJ for now)

So it is possible that they will be awkwardly adjusting due to being too cautious until one party gives in and mentions they need to be more frank towards each other.

Then the chemistry start to change. Even though same age, Hyojin would act as if he is older than Changyoon.

Both knew about each other’s singing ability and will occasionally hang out at Karaoke. Bonus actually if they both have Youtube account that upload covers,you might suggest them to upload a cover video to Youtube. Also occasionally you are the one who suggested song titles for them to cover.

Then their subscribers might wonder how did they get close and as more collaborations happen, they just tell the truth.

If you are Changyoon’s sibling, you will help out by finishing his sentences when he is buffering. Hyojin knew about it as they are in the same class, he will give Changyoon some time to reorganize.

But then if they do fight, Hyojin surely will be the one blasting words, being on point as possible. (this scenario is rare unless it is something that triggered he to the point he could not hold in)

Even though they look “not close”, they will still laugh at each other’s jokes and weird antics. 

When they both are older, one of them had a notion to get a tattoo and started researching it and another gained interest after peaking. Then they both went to get tattoo together, Hyojin even get 2 because he could not decide. (Maybe later end up being scolded by parents lol)

Scenario  (You being the youngest or being the one to be born later)

Your elder brothers play with you by giving out a lot of weird aegyos. And then they will laugh at themselves for being OOC

BTW you three when playing hide and seek or tag in the house will defo turn the house up side down. 

From your childhood memory, Changyoon seems to be the brother who is smitten with you, typically likes to squish your chubby cheeks when you are still younger. Hyojin would be the sometimes prankster that would jumpscare you.

When you are toddler, Changyoon carries you in his arms most while Hyojin piggybacks you the most.

But both of their love are endless for the younger sibling. you might find it funny when you introduced your boyfriend/Partner to your brothers and Hyojin is the one who is being unsettled.

If you are from Hyojin’s side, similar with your brother, you might find Changyoon a bit intimidating. 

If you are from Changyoon’s side and you have opposite personality, you will be the one to approach Hyojin first.

BLESS your ears when they sing in the house.

RIP your ears when you play video games or monopoly with them both.

YOU FORCING THEM TO GO INTO HAUNTED HOUSES DURING THEME PARK VISIT BECAUSE YOU WON ROCK PAPER SCISSORS, and you are trying hard to catch your breathe as you laugh at your big brothers. Also RIP your ears.

OH AND RIP YOUR SOUL if you happen to messed up. Them both will nag you for sure. Changyoon is a more softer type big brother while Hyojin definitely is a more stern type. Changyoon forgives/lets go easily after he criticized and understood that you will learn from the mistake. But Hyojin will need you to understand what you have done wrong and exactly what led towards the mistake before letting you go free from his nagging.

So unlike previous sibling hcs, you will not go to only 1 brother when you ask for opinion/guides in life choices. You will come to them both same time. Even if 1 of them are not present, you will wait until them both are free and all ears.

They are supportive, but also worry if you are perfectly prepared of your choices.

Hearing them discussing in front of you before turn their opinion towards you actually can give you great insight too.  Hyojin will elaborate the consequences and makes sure that you understand and you have the mental preparation to bear it. Changyoon will be the worrywart and asking you some blindspot matter that you did not think of.

If your personality happens to be funny and a bit of crackhead underneath a serious facade, Changyoon will team up with you if you start something funny or you  joining Changyoon. Hyojin would be at one side clapping and laughing his heart out.

Changyoon : Woah, my younger sibling indeed, you sure have sense of humour

lol

If your personality is somewhat closer to Hyojin’s, you and Hyojin both will be supportive when Changyoon participating in singing competition.

Fun fact, should Changyoon participates, Hyojin will not participate. Same goes with the other way round.

Man this episode is really gold and exactly fits to what I can think off for Sibling!AU (should Hyojin is EFSJ by some source)

Main reason I did not include this kind of headcanons is because I tried to stay genderless so that my readers can be more flexible. Also cos my hcs are more to the essential parts. Like your sibling won't do bf type of actions right? So the video of the webdrama is just a reference to elaborate more for sibling au.

Like i established in the double Kim's household hc, He definitely gonna help you adjust your yourself new fam. Definitely going to be aware of needs of his side and your side of family.

Pasta thing is oblivious so I am gonna let it slide

But it did confirm a thing, even if others had a notion to do something but shy to initiate it, he will be the one to initiate (of course, after a proper observation and thoughts because let's not forget he is also a Taurus sun and Virgo moon)

So I dunno if the scriptwriter tried to include some real life aspect of Hyojin personality? Or its just pure coincidence. Cos Idk the characters all have a slight bit of their real life trait that's why they seems comfortable with their role.

(Sorry I am sensitive in this part because I studied some script and story writing in my uni days so,thinking deep about the behind the scenes is inevitable habit)

Like how Changyoon/Taejun might at first looks intimidating but then is a huge soft fluff hamster shark. And then Minkyun/In Guk might look like the carefree younger brother type exact similar role/vibe he has in ONF.