Day one - singer katsuki bakugo x fangirl/crush reader twin sister of tsuyu asui

Genre: fluff

Rock band au,

Story idea : you are y/n asui. Twin sister of tsuyu asui. You're also a well known artist. Plus you're a fangirl of a certain rock band. The singer of this band is your favourite. His name is Katsuki bakugou. He grew up with your twin sister cause he went to the same school as you. One night months before one of his live concerts. He met you at a club with tsuyu. It was love at first sight .But because of your crappy past with guys in previous relationships. You were scared to get into a relationship again. So he wrote a rock version of a song called "day one" and played it at his concert. You went to the concert and heard the song. Eventually after a year you and him got together. Your first real healthy relationship with a guy. And the good news is that you're still with him to this day. With two little kids.
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Chorus
You know i wanted you since day one
Ay
Why you wasting all your time
With these sorry fuckin' guys
no , i finally had to say sum
Ay

You are the twin sister of Tsuyu asui. You went to a different school growing up so you never got to meet your twin's friends. Now at the age of 22 you are a well known artist. You went to an art college in Kyoto before moving back. You missed your family too much. There was this band that you were obsessed with recently. You had no idea that your twin knew the band you were obsessed with.

She was friends with some of the band members. And you got to see them in person. So the week you got home from living in kyoto. You bumped into your friends from high school. You got chatting to them. Then went home to see your family. That night you were invited to a club. You accepted and that's when you met him.

You were at the bar with Sui when you turned around to see the band name at the same bar as you. The leader, singer and main guitarist of the band was someone who have fancied. What can you say? He was hot and talented. You were in shock when you found out that your twin sister tsuyu knew them ''sis you know them? How?'' you asked ''i went to school with some of them'' she said

Cause it breaks me up inside
When you fuck with other guys
You know
Didn't want it to go this way
Oh no
You had me beggin but
You ain't even know
My head spinning in circles for you
So can you give me a chance before you go

''you went to school with them! Sis! Why didn't you tell me? You need to introduce me to them now?'' you asked her. ''You're asking me to introduce you to the band cause why? Do you have a crush on the leader singer and guitarist? y/n, i thought you weren't going to start dating again? Your past with guys .. hasn't been the best'' she reminded you ''yeah i know that sis and i don't want to start dating.. But it's him come on'' you whined to her.

Sui brought you over to the band ''hey guys'' she said to them ''hey sui, where have you been?'' Mina asked ''I've been with my twin sister here, she just came back today from being in kyoto, so we are out here to celebrate her return'' she said back ''twin? You have a twin?'' kyoka asked ''yeah, my twin sister y/n asui'' she said introducing you to the band ''hi it's pleasure to meet you guys'' you said to them. You got to know the band. It was cool that you got to meet your favourite band. When it got late you and Sui left the bar. You had no idea that the leader of the band. Your crush. Was planning something.

Katsuki pov
After a hard jam session at the music studio. Me and the gang went out to the bar in town. Mina pointed over to the counter of the bar ''is that tsuyu asui? Who is she with? Wait, could that be the sister told us about back in our UA days?'' she asked. I looked over to where she was pointing. ''I don't know, maybe'' I said back. Throughout the night I did see the girl that was with Sui stealing a few glances at me then back at sui.

Verse
No I'm not like the rest
I'll give you everything you want
I know your ins and your outs
I'll give you everything I got
Whatchu want from these dudes
They're playing games with your heart

After a small conversation I saw them both walking over to my table. ''Hey guys'' she said to us ''hey sui, where have you been?'' Mina asked ''oh I've just been with my twin sister here, she just came back from living in kyoto so we are out here to celebrate her return'' she said to her ''twin? You have a twin sister?'' kyoka asked in shock, "yeah my twin sister y/n asui'' she said introducing her to us. ''I remember you saying you had two sisters but didn't know you had a twin,'' Denki said to her.

Later that night, sui and y/n left our table. There were barely any people left at the bar so we all went home too. I heard from Sui that y/n is scared of relationships and dating cause of her past. I didn't dive into too much detail but it was not the best. But I wanted to try my shot at dating her. Since that night I have wanted to get to know her better. So I wrote a song. Sui didn't tell me that y/n was a massive fan of me or my band.

There were millions of people at the concert. When the band was performing at. And there was y/n and her twin sister in the front row seats. She went along so you wouldn't be alone on the day of the concert. You were wearing a few merch types. You were having so much fun singing and dancing alone to the older songs and the new ones too. You had no idea that the brand knew song was about a particular girl. That the leader of the band met at a particular bar.

I can see right through
Their intentions from the start
I know you're miles away but I'm still here
I could tell you everything you wanted to hear
When you need me to listen I'm all ears
Just give me a chance and please don't fear

You were having so much fun just dancing at the concert. You didn't noticed that the leader singer was staring at you. ''Sis, he looking at you'' she said ''hmm.. What? Who is staring at me?'' you asked ''look up at the stage'' she said back. You looked up at the stage to see that katsuki bakugou was indeed staring at you. Looking away you blushed. Cause he was your crush. And well hehe. The song went one as you danced but just less noticeable now. You were still embarrassed.

The song went on until it finished. Katsuki decided to say something into the mic before they moved onto another song for the concert list. ''I'm so glad that so many of our adoring fans came to see us tonight, I just want to make a special announcement about one of out songs and why I wrote''' he took a breather before continuing ''for those of who don't know we all went to UA high school.

There was a girl we met back in our school days. And that girls and her twin sister are here at this concert tonight with her twin sister. We got to meet the twin sister y/n asui at a bar the day she came back from kyoto. She is an amazing person with a heart full of gold and deserves everything in the world'' he said ''what is happening?'' you asked sui ''you didn't tell him? You didn't? Did you?'' you asked her

''No i didn't y/n, just chill and wait for him to finish, i don't think it's over'' sui said back to her. Sui was indeed right. Katsuki continued to speak. It was sweet what he did next. He winked at y/n then started another song. You almost fainted from the wink. Did you know not that a wink. Just one wink has enough power to make a fan feel weak to the knees. The other fans weren't that happy about their favourite band member but sort of confessed his feelings to a normal girl. Well that's what they thought. They didn't know you were a famous artist yourself so ha.

[Chorus]
You know I wanted you since day one
Ay
Why you wasting all your time
With these sorry fuckin' guys
No, I finally had to say sum
Ay

After the concert. The audience left. It was just you and Sui left in the stadium. You were about to go when a security guard called you over ''y/n asui and tsuyu asui can you come with me'' she said ''ok, come on lets go y/n'' sui said pulling her twin sister backstage. As you and Sui followed the guard to the lounge area. The band was just sitting around. ''Hey sui? Hey y/n?'' they said back ''hi guys'' sui said. You just nodded to them. ''Oh right y/n can you come with me for a second'' the security guard asked ''hmm what?'' you asked confused.

After being shooed by your twin sister sui. You left with the security guard ''so why is my twin sister y/n being taken away again? Sui asked them. They didn't want to tell her that their leader Katsuki wanted to talk to her in private. ''Mina what are you guys hiding? I thought we were friends?'' she asked them ''fine fine, katsuki wanted to talk to y/n privately'' eijiro said to her ''privately... why? Wait he isn't going to confess is he?'' she asked him ''i don't know. But all i know is that he has a smirk on his face when he told the security guard that brought you backstage to bring y/n asui to him'' mina said to her

Meanwhile you were standing outside the dressing room for katsuki bakugou. The guard let the leader know that y/n asui was here. Then she left you. He opened the door with a smile to see you alone ''your here, come in'' he said ''your y/n asui right?'' he asked ''yeah that's me'' you said back ''you're that famous artist i heard so much about from sui'' he said to you with a smile ''so much did my sui tell you about me? You asked ''enough info for me to fall in love with you cutie'' he said to you.

You were shocked at his words ''fall in love with me?... What are you trying to say? ... you love me?'' you asked him ''well yeah that's about the just of it'' he said back ''i want to get to know you y/n' he said back ''i don't know.. I mean do you really want to date someone who has never been in a real relationship?'' you asked him ''i don't care if you have been in a real relationship or just had bad experiences, i still want you'' he said. You were feeling faint from all the information you just got. You sat down on the sofa in the dressing room. He sat beside you. Katsuki took your hand in his.

Cause it breaks me up inside
When you fuck with other guys
You know
Didn't want it to go this way
Oh no
You had me begging but you ain't even know
My head is spinning in circles for you so
Can you give me a chance before you go

For the rest of the evening you and Katsuki talked. He got to know you bit by bit. You exchanged numbers and that's how things started for you and katsuki bakugou. He was so sweet and kind during your dates. He would never force you. Or pressure you into anything you didn't like. He was always patient with you when it came to you speaking. He would go to art shows with you on dates and even went with you to an art exhibition where they had one of your at pieces up as part of a big art competition. You were excited about the competition cause you were one of the many artists there today that were nominated. Three people won that day.

You came in first place. But to be fair, you were already going to win the first place. I mean you are dating katsuki bakugou so like hehe. You and Katsuki continued to date through the years, keeping away from the media reports. When you got to your 3 year anniversary you and Katsuki went away for a month. Just to get away from it all. And to be alone together when you weren't busy. You were never expecting this to happen. It was too soon in the relationship. But you and Katsuki decided to keep it the secret to yourself until you and Katsuki were ready to tell people.

You hadn't told the public that you were dating cause in fairness it's not their business to know who is dating who. And the whole degrading questions are just annoying and rude in your opinion. And that's why katsuki likes you so much. He doesn't particularly like the media either. So anyway when you and Katsuki got home. The first thing was to check with a good doctor. Before telling anyone of the news.

The day you went to the doctors. And then told you and your bf katsuki. That you were with his child. It was a shock to the system. You had a hunch that you might be pregnant. But this just confirms it to reality. You took the sonogram back home and told your parents first before telling your friends. They were shocked about the news as they also thought it was too early in the relationship for a family just yet. With the fact that Katsuki was about to tour in two months' time and you were about to open your own artist studio.

[Verse 2]
I been loving you since our day one
Girl you the sauce
I ain't talking bout the A1
Feeling locked up
Now I be going Akon
Seasons turn to snow
Because I ain't the one to flake on

People we're going find out sooner than later. It was annoying but. With both your hands being tied in this situation. You had no choice in the matter. Cause you didn't tell the public then they would just make up so stupid story. And if you did tell them they would just blow the truth out of proportion like they always do. So you and Katsuki told the public. And well that's what happened. The media blow the truth out of proportion. Like they do about every thing they hear. .

Your bf katsuki got very over protective of you and his unborn child/ childs. That hasn't been decided yet. But anyway. Katsuki issued two of his security guards on you at all times when you were out in public so nothing happens to you while he is away on tour. Since he would travel to different countries while you would stay put in japan because of your job and the baby. You and Katsuki would facetime when you were both free. Sometimes he would face- time with you just to check in on you and his baby. Making sure you're both safe, healthy and ok.

He missed you so much. So after the concert tour he rushed home. He didn't want to meet anyone else except for you and his unborn baby. Katsuki arrived back to the big apartment you and him live in. ''babe'' where are you?'' he asked ''i'm in the living room'' you called out to him. Katsuki walked around the apartment. Making his way to the living room. To see you laying quite comfortably on the big sofa. Surrounded by blankets and snacks. You're around 3 months long now ''You look quite comfy?'' he asked you smiling ''well yeah she is getting a bit annoying, she is taking after you'' you said jokily ''wait she.. Are we having a little girl? When did you find out?'' he asked ''two weeks ago, i wanted to surprise you kacchan'' you said to him.

Give me
The chance cause
I could blow your mind
One take
Press play
And then we hit rewind
Writing letters in my bed
Rather be with you instead

For the next few months up until your due date. Your bf katsuki was by your side. He got use to the weird pregnancy cravings, the differently emotional attitudes, and hormonal changes that came along with your pregnancies. (fast-forward 6 months later) the week of your due date was coming up real soon. It was getting much harder for you to move around with your little girl always kicking around.

You swear on your life that your little girl was going to turn in to a kickboxer when she grows up. The day of the due date. It was just a normal day. Sitting on the big sofa in the living room. Your bf katsuki was around in the kitchen making you food cause you were hungry. When you felt water dripping down your leg.

You screamed. Your bf katsuki dropped everything and ran to your side. ''What happened? Are you ok? Is our daughter ok?'' he asked you ''my water just broke'' you said to him as you started to have very strong cramps. Your bf katsuki rushed you to the car. He grabbed all the bags for the hospital. Before driving you off. When you got there. You were admitted straight away to a private room. You stayed there for least 48 hrs before giving her birth to your baby girl.

I was drowning in some water
Cause I don't know how to tread
I just need some peace and rest
And some loving I confess
Smokin' all up on this gas
Just to get away from stress

The doctor handed the baby to the nurse. The nurse cleaned the blood and gue off her and wrapped her in a blue pink blanket. The nurse handed your baby girl over to you. You held her in your arms ''do we have a name for the girl?'' the doctor asked ''no not yet'' katsuki said to her ''ok well that's not a problem, we just keep her as baby girl asui'' she said ''no baby girl asui bakugou'' you said to the doctor.

As you smiled at your bf katsuki. You and Katsuki shared a kiss before being moved to the visiting rooms. For you to rest after the labour. The baby was sleeping beside you in the hospital crib. Your bf katsuki went to get your parents and his parents. Since he called them before the birth had happened.

When you woke up to your daughter stirring. You went to check on her. Your bf katsuki came back with both parents. Your mom and dad got to see their granddaughter first. Then, they left. Katsuki's parents got to see they grand-daughter before they left also. Your friends and your twin sister tsuyu came in later. They got to meet their niece. After they left the hospital.

[Chorus]
You know I wanted you since day one
Ay
Why you wasting all your time
With these sorry fuckin' guys
No, I finally had to say sum
Ay

You and Katsuki had a long talk about a name for the girl. Since you couldn't come up with one while you were pregnant with her. So after about 3 hrs of thinking of names. You and Katsuki came up with a name kyoko Asui bakugou (meaning of the name ''child of the city'') She had your green hair and Katsuki's eyes. And for her face features (she had your nose and lip shape. And Katsuki's chin and eye shape)

A week later you were discharged from the hospital. You paged your bf katsuki of 3 years to pick you up. Katsuki drove to the hospital. He got out of the car and helped you into the front passenger seat. He safely buckled into his daughter in the baby car seat. He took you both home. Finally, Katsuki can have his family.

When you got home. The whole apartment was baby proof. You settled your daughter down in the baby room next to the master bedroom. You went to lie down on the bed. As your bf packed everything away for the rest of the day. It took a while to get used to the whole ''get up at 3 am'' thing in the morning to feed your daughter.

But you eventually got the handle of it. Your bf helped you for 8 months before going back to work. You stayed at home for another 3 months while on the search for a nanny. Once you found a nanny you went back to work. The nanny looked after your daughter kyoko for two years before moving on to another family. kyoko is now 2 years old. Which would make you in a 5 year relationship with the leader and singer and guitarist katsuki bakugou.

Cause it breaks me up inside
When you fuck with other guys
You know
Didn't want it to go this way
Oh no
You had me begging but you ain't even know
My head is spinning in circles for you so
Can you give me a chance before you go

Your bf katsuki of 5 years took you to a nice romantic restaurant for a date. You were seated next to the window of the restaurant. After drinks and food were ordered. And the waiter left your table. You stared out the window at the view. The food and drinks were delivered and after the dinner. Your bf Katsuki got up from his seat. He kneeled down beside your chair.

You didn't know where what was happening. Other than the fact that you wanted to cuddle your daughter when you got home. You looked around for the waiter. So they could give you the bill and leave. That's when you looked down to see your bf right infront of you ''babe? What is going on?'' you asked ''y/n, my baby, i'm so glad that you're here with me tonight to hear this, i'm so glad that we met that one night through your twin sister tsuyu asui, casue i have loved you for the last 5 years. We have our beautiful daughter who is only 2. And if I had a choice to go back to when we first met, i would choose you every time. You are just so beautiful and perfect'' he said to you

''Babe, don't make me cry'' you said to tears forming in your eyes ''well hold those tears y/n i'm done yet .. that being said. It would make me the happiest man in the world if you would do me the honours of becoming the new miss. Bakugou and marry me?'' he asked you. He popped out a ring. ''Omg yes yes yes, ofc i'll marry you katsuki, i love you so much'' you said to him. You cried as he slipped the ring onto your finger. After the bill was paid you and your now fiancé Katsuki went home. You relieved your babysitter. You told your parents, family and friends of the engagement. After the media got word of it and was again all over your asses trying to get some answers. You and your fiancé declined every interview they threw at you. Cause you and him couldn't care less.

<<<2 years>>>
Two things happened. 1)you got pregnant again. This time you were having a baby boy. Your little girl was excited to have a baby brother and had to keep it a secret away from her daddy until you told him. You eventually told Katsuki that he was going to be a father again to a little boy. he was overjoyed at the news of having a son.

(Fast-forward  9 months and 48 hrs later) you gave birth to your son. You named him hiroki Asui bakugou (meaning of the name ''abundant joy/ strength'). He had your green eyes and his dad's ashen blond hair. For face features( he had your eye and lip shape and his dad's nose and chin shape). Your whole family, friends and your baby girl loved him so much.

2) Your wedding happened. It was just absolutely beautiful. The day was amazing. All your friends, family were there to see you get married to the love of your life, Katsuki bakugou. Parent of two kids already. Your son was brought down the aisle in a very decorated baby pram and your daughter now 4. Was your the flower girl. The day was just wonderfully. After the amazing wedding and reception. You and Katsuki went on your honey - moon for two weeks. It was just amazing. You came back home to japan. To your family. Your friends. Your lives. Your jobs. Your lovely apartment home. And your amazingly cute kids.

The end
Meaning of then names
Daughter
Kyoko - child of the city
Hiroki - abundant joy/ strength

Word count: 4399
This story is so cute. It was so much fun to create. I really really love this song by rudywade. His music is amazing. And the photo I found of katsuki bakugou. Fits the story perfectly with the au i picked to. So the story came together quite nicely. It's a katsuki bakugou fluff story. Hope you guys enjoy it! See you guys in the next story ✌️