Prologue
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「Nn……」
It was bright at the other side of my eyelid. I opened my eyes.
Then a different ceiling that usual entered my eyes. I thought for a while.
──Where is this?
First I sorted out the situation in order.
I──Mononobe Yuu was living as student in Midgard, an isolated island located far south to Japan.
Gathered here were girls with ability to convert material who were called “D”.
But I also possessed the ability of “D” despite being a male.
The room that was assigned to a boy like me wasn’t in the girl dormitory where other students lived, but in a room of the lodging house of my little sister Mitsuki.
And this room was undoubtedly not my room.
When I moved my gaze, the bright blue sky was expanding there outside the window. The sunlight shining into the room was painful to the eyes, but the location of the sun was still low.
The air of the room was also cool. It allowed me to guess that right now was early morning.
「Kuuuu……suuuu……」
But a warm breathing pushed aside that morning air and touched my neck.
When I looked that way while feeling ticklish, a beautiful girl’s sleeping face was there right in front of me.
「……Mitsuki」
I muttered the name of the girl who was the student council president of Midgard Academy and also my little sister.
Both Mitsuki and I were wearing uniform. And it seemed we slept on a bed.
「Aa, I see──yesterday we prepared for Christmas Party until late at night……」
I finally remembered.
This was in the academy’s student council room.
I was appointed as an executive committee member of the Christmas party that would be held. I was dealing with a lot of work together with Mitsuki.
However there were also other things like unexpected trouble for example, which took longer than expected to deal with. Our works continued until late at night so we decided to take a bit of nap but──.
「Even though I said to wake me up after thirty minutes, why is Mitsuki also sleeping together with me……」
I reached out toward Mitsuki who was sleeping soundly, but then she rubbed her cheek on my hand.
「Nnu……Nii-saaan……」
I lost any will to complain seeing that expression. I raised my body and then shook her body.
「Oi, Mitsuki.」
「Nn……?」
Then Mitsuki’s systematic sleeper breathing went out of order. Her closed eyelids cracked slightly open.
「Nii, san……?」
Mitsuki stared at me in a daze.
「Morning.」
「…………Good morning. Nnn……what time, is it?」
Mitsuki asked me. I checked the time in my phone.
「It’s five thirty in the morning.」
Mitsuki was dumbfounded for a while hearing that. Then she held her head.
「Aaaaaaaaaa……」
「We have done it now.」
「Yes……I only planned to rest for a bit beside Nii-san but……」
Mitsuki stood up unsteadily. Her shoulders dropped in dejection.
「If you wanted to rest, it would be better if you woke me up first wouldn’t it?」
I pointed out what was only natural, but Mitsuki glared at me for some reason.
「……This is Nii-san’s fault you know? If you showed me a sleeping face that looked so happy……it couldn’t be helped that it made me hesitated to wake Nii-san up. It couldn’t be helped……that I wanted to stare at Nii-san from the side.」
Mitsuki declared with her head held high.
「That’s──well, my bad.」
Thinking that it would be pointless even if I argued her about that, I plopped my hand on Mitsuki’s head.
After all I was the same like her with how I got entranced by her sleeping face.
「No, umm, that, it’s not like I’m seriously blaming Nii-san……」
「I know. More importantly we still have time until it’s time for class, how about we return to the lodging house first?」
I lightly caressed Mitsuki’s head before standing up. Then I offered her my hand.
「……You’re right. I want to return and take a shower.」
Mitsuki nodded and took my hand, but for some reason she didn’t show any sign of standing up.
「Mitsuki?」
I looked at her questioningly. Then Mitsuki’s gaze wandered around while she said.
「Umm, N-Nii-san……I’m……still sleepy……I can’t walk well, I think……」
Mitsuki looked at me with an expression of expecting something. I smiled wryly seeing her like that.
「Roger. I’ll carry you on my back, student council president.」
I nodded jokingly before crouching down and presenting my back to her.
「──Please do so, Nii-san.」
Mitsuki answered with a voice that was quite excited despite claiming to be sleepy. She put her hands around my neck and leaned forward on my body.
And then I carried Mitsuki on my back and left the student council room.
「Fufu……Nii-san, you smell a bit sweaty.」
Mitsuki smiled and pushed her face on my neck while I walked through the empty corridor.
「Then it’s fine if you get down.」
「No, absolutely not.」
Mitsuki clung on me tightly.
「……Do you, like this that much?」
Recently Mitsuki would sometimes demand to be carried on my back. I asked Mitsuki who was on my back.
「Yes……because, I can really feel Nii-san like this. That Nii-san is right here……that this isn’t a dream……I can feel it keenly.」
Mitsuki responded with a voice that was seeped with a strong emotion.
Even I somehow understood what Mitsuki was thinking.
After all right now we were spending peaceful ordinary days in Midgard which was really felt like a miracle.
「A lot of thing happened.」
「True……there were a lot of things.」
We thought back.
In this island everlasting summer where Christmas was approaching closely──while following the short path home that was showered by the dazzling morning sunlight──we looked back.
Of the path that we had walked on until this far.
And then at the same time we imagined.
The form of the future that we were heading to from here on──.
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