My Sister Get Complex On Me And I’m In Her Body Now!!!?

Life always has a surprise for us.

Everything always happens unexpectedly, and sometimes supernatural things or something illogical might happen.

"H-How is this! How can I be in your body! Yukio, explain this and don't just smile happily like that!"

And I, have a part of it.

"Come on Miki-nii, don't be hysterical like that. My body just had an accident. No, I mean it's Miki-nii's body."

"Don't mess with me!"

...............

It all starts with an ordinary morning.

"Huaaa...Good morning. You woke up so fast, Mikio...."

Said mother with a messy hair.

"Morning mom. If I don't wake up early enough then no one will make you breakfast. You can't even cook and can only order at the restaurant, right?"

My name is Mikio Kurokawa. Living in an ordinary family, and I'm normal high school student.

"Harggh.... Just hearing your opinion in the morning makes me want to be lazy."

Mother said as she stroked her messy hair, then sat down at the dining table.

"Hahh... That should motivate mom to learn to cook, right?"

"No thanks. The responsibility of cooking has been given to you since you were able to do it."

"Hah..."

I can only sigh hearing it.

That's how I became the one who took care of the kitchen. My mother was too lazy to learn to cook long ago, and ever since I started cooking in middle school she made me take responsibility for making breakfast and dinner.

"Onii-chan's cooking is really good, so keep making it for us forever!"

"Hmm, hmm, that's right, as long as Onii-chan makes us food, we'll always be happy!"

Said my younger sisters and younger brother who had sat down first.

"That won't happen when you guys grow up."

I said with a wry smile as I rubbed their heads.

In our family, I am the eldest child, and I also have 3 younger siblings.

These two are Yuuji and Yuukari. They are twins, Yuuji is a boy and Yuukari is a girl, and she is 5 minutes older than Yuuji. They look identical with their short hair, regardless of gender. They are still in grade 3 elementary school.

"Where's dad? If he's not here in 5 seconds he won't get his breakfast."

"I'm here, I'm here. Gosh, I wasn't even allowed to wear my tie properly by my son."

My father came out of his room while he was fixing his tie.

I forgot, and there's my other little sister....

And my other little sister....

"Gosh, Yukio. After your shower you should dry your hair, come over here."

A girl came out in her school uniform, but her long hair was still so wet it bothered me. I immediately grabbed a towel and started wiping her head.

"S-Sorry..."

This is my sister, Yukio. She is a clumsy girl, so she has no friends and becomes a loner. In addition, she has anemia which makes it difficult for her to move.

She was very shy, and her height reached at least my shoulders. And for your information, my height is 175 cm.

Her straight hair was messy after I finished drying it.

"Thank You....."

"Yeah, but first fix your hair."

"No."

"...."

To that answer, I couldn't help but remain silent whenever she said it. I mean, why doesn't she want to get her hair to fix?

"Hahh... You really hate your hair or something until you won't to fix it."

With a sigh, I rubbed her head with my hand. Yukio seemed to like it as she closed her eyes. She's like hamster that make her cute.

Her messy hair is also one of the reasons why she is always left alone with no friends. She looked like a ghost with hair covering her face. Though if she tidied it up a bit, she would look pretty.

But I will respect her decision, although I don't know the reason.

By the way, we are twins too. Yes, even though we are not identical and most people think we are not siblings, I want to believe that we are.

"You guys are really close, aren't you."

Said mother who looked at us with a yawn.

"Of course. It's because we're siblings."

I replied as I sat down at the table.

Everyone stared at me in silence after saying that.

Wait, why are they looking at me like that? Hey Yuuji, Yuukari, why are you guys doing that too? Did I say something wrong?

In that strange silence, I finally asked them.

"What?"

"Uhh... Did we never tell him?"

Mom asked to dad.

"I think so?"

"W-What do you mean?"

What do they all know something that I don't know? I feel ostracized from this family.

"Listen Mikio, it might be a bit late but Yukio isn't really your sibling. She's actually the child we found and raised together."

Huh?

What?

What did you say?

"Can you repeat again?"

"Yukio is not your sibling."

"And everyone including Yukio, Yuuji and Yuukari, or father knows this apart from me?"

"We seemed to have forgotten about you when there was a serious family meeting earlier."

What kind of reason is that?

"Okay.... Then when we were little why did mom say we were twins?"

"That's for you to don't ask me more because I'm lazy to answer, te-hee~"

"Don't te-hee to me at your old age!!"

"Why are you angry over there! And I'm not that old!!"

"Ha...."

I hold my head. The headache from hearing the news I should have heard a long time ago made my brain unable to process it.

I then looked at Yukio.

"Yukio, you knew this and didn't tell me?"

Yukio had a nervous look behind her hair when I said that.

"Th-That's because Miki-nii never asked."

"...."

.........

With that, I finally found out that Yukio and I weren't twins. My heart cracked a bit after knowing it, you know?

"What's wrong Yukio?"

Yukio and I are currently on our way to school. And she's been looking down since breakfast.

"D-Does Miki-nii hate me?"

she asked nervously.

Oh, so that's how it is. She must have thought that I would hate her when I found out that she and I weren't siblings. So that must be the reason she never told me the truth.

"No, I never hated you. I'm just a little annoyed at mom and dad because never telling me this. Of course I still love you very much."

I then stroked her head gently as a sign of apology.

Yukio smiled faintly through her hair when I did it.

I'm glad to see her like that.

"Can you stop for a moment, Miki-nii."

"Ehh? Sure, is something wrong?"

They then stopped in front of a temple gate.

Yukio continued to be silent for a while, until she finally spoke.

"You know Miki-nii, we've been together a long time."

"Yeah, it's been a long time since we were babies. Isn't that right?"

I replied with a nostalgic smile. We were always glued together like glue because Yukio had to always be alone which made me invite her to play.

"Yeah, it's been so long that I can only stare at you from afar because of the state of my body."

"...."

I couldn't answer that part and just kept my mouth shut. As time passed, the time I spent with Yukio decreased as I also played with my other friends.

I continued to listen to her in silence.

"I, I've always envied Miki-nii. Being able to have friends, playing with other people, athletic body..."

ring....

The sound of the bell rang.

"...It makes me want to be like you, Miki-nii. However, that jealousy always goes away with the affection that Miki-nii gives."

Yukio then looked straight at me.

"The tenderness and affection that Miki-nii gives me makes me very happy."

While making a happy smile, she slowly drew closer until the distance between us was only a sheet of paper.

Somehow I had a bad feeling about the words she would said.

"All of that makes me feel something more than sibling..."

"Miki-nii, I've always loved you. Not as a sibling anymore, but as a girl."

Yukio then tiptoed and suddenly gave....give me a kiss!!?

Her moist lips blend into mine.

I was stunned for a moment.

But I quickly came back to my senses, and left some space between us.

"Y-Yukio... What are you doing? We're siblings. Even though we're not blood related, I already treat you like that."

Hearing that, she had a dark expression on her face as she lowered her head.

With a downcast face, Yukio said.

"Like I said, I love Miki-nii more than that. So, I want Miki-nii to accept my feelings."

Yukio approached me again, but I held her back with my arm.

Seeing my obvious refusal, she looked into my eyes with watery eyes.

"I'm sorry, I'm sorry I can't accept your feelings. I can't consider the person I have considered my own sister as a girlfriend."

With a bitter face I refused.

In reality, I had thought of Yukio as my own little sister, and that was hard to change in one day. Taking her as my girlfriend.... That's definitely impossible.

"I see....."

Yukio had a darkening expression on her face.

"Sorry..."

That's the only word I can give to her.

Yukio then let go of my hands that were on her shoulders, then with tears flowing, she ran.

"Yukio!"

I followed behind.

"Yukio, wait!"

Without heeding my words, she kept running.

Since I exercised quite a lot, I was able to catch her quickly.

"Wait!"

I finally managed to reach it with my arm.

But a fatal thing happened because of my careless.

Krieekkk!!!!

"Huh!"

A truck was coming from a crossroads, and because we were coming from the left towards the middle of the road it made us look like we were coming suddenly so the truck driver would not be able to stop the vehicle in time.

"Yukio!"

Taking very little time, I grabbed Yukio and pushed her to the side. I was also about to dodge by jumping to the other side, but time was running out.

Bruak!

With the sound of something cracking, I was thrown off followed by pain and my vision darkened.

"Ahh, yes.... It seems that I will be transferred to another world...."

I'm still muttering stupid things at the last minute.

With that in mind, my consciousness has been cut off.

----

Soo dark....

Where am I....

My mind was a mess. I don't remember or know what was going on here. The last thing I know is that I've been hit by a truck-kun.

ring...

What's that?

Bell sound?

ring....

The voice once again rang. As it's guiding me, the sound of the bell pointed to a very bright spot of light.

I made it to that point. Then a strong light tugged at my consciousness, until finally……

"I'm still alive......"

I managed to get up. I thought I would die and then be transported to another world for a second life because I had been hit by a truck. Unfortunately it's not happen, huh. No, I should be happy about this because I can still be with my family.

Ignoring that, I looked around to find out my current state.

I seem to have been in the hospital for treatment.

Wait, by the way didn't I hear Yukio's voice earlier? Where is she? Thank goodness she's okay.

"Yukio.... Where are you?"

I heard her voice again.

Again.....?

Isn't that my own voice?

"Yukio, don't joke with me."

Once again I heard her voice.

No, it's.... My voice, isn't it? There's no way Mikio could follow my words without hearing them first.

I quickly straightened my back to sit up.

Urgh... What is this... Why does my chest feel heavy.

"Uhh... What's this lump?"

I asked confusedly when I saw that there were something sticks to my chest.

I was then stunned when I slowly realized something.

Wait, it's a woman's chest, then Mikio's voice....

Shouldn't it be....

The worst situation pictured in my mind.

"Ahh, Miki-nii! You're finally awake!"

A familiar voice came out, as the curtain opened.

Then I was surprised when I looked at my own body without the help of a mirror.

This.... This is impossible, right!!!?

"Miki-nii!"

With a big smile, he, aka myself called out to me in a happy voice.

Those familiar words that used to come out of my sister, how come they are in my body now!!?