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Translator: penny
Chapter: 1
Chapter Title: 1.1 Sister, Naiad Winzer
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「Year 22, 3/1 (Mon)
★Game Start★
No route branches
Mostly forced events (tutorial)
Early in the morning, Naibusu visits the protagonist's house.
Protagonist, Naibusu, and Hina head to school together.
Akane joins midway, making it four people.
Caught by Teacher Tanaka at the academy's main gate.
Naibusu's blonde hair gets called out.
Naibusu brushes it off, but Yuuki protests.
Teacher Akatsuki joins in midway to scold them.
The Student Council President steps in to mediate.
Opening ceremony = nothing special.
School ends, and that's it.
First day ends.
→Forced event
↓↓↓Must prevent!!↓↓↓
Tanaka drugs and assaults Akatsuki in the restricted area.
↑↑↑Must prevent!!↑↑↑
」
I double-check the notebook, which is so worn from reading it too many times that it's falling apart.
This notebook is the setting document where, after realizing I'd been possessed, I jotted down every bit of original story information I could remember.
And in this setting notebook, there's an important event on the first day of school at the academy today—one I absolutely cannot miss.
It's Teacher Akatsuki's assault event.
"Naibusu! Are you up? Come eat!"
"Yeah. Coming."
Naibusu Winzer.
A subcharacter from the hardcore assault eroge Rune Academia, released ten years ago.
I'd been possessed by this subcharacter with such a gloomy name.
"Phew. So it finally begins."
I close the setting notebook and stand up from my chair.
Today is March 1st, Year 22.
It's the opening day of Rune Academy, where those born with innate 'runes'—superpowers—attend. It's also the day the original game Rune Academia begins.
◇◇◇◆◇◇◇
"Naibusu, you know school starts at the academy today, right?"
My sister Naiad glances up at me briefly before dropping her eyes back to the table.
She looks even colder than usual, probably worn out from preparing for the new term.
"Yeah, Naiad sis."
Naiad Winzer.
Naibusu's older sister and an English teacher at Rune Academy.
She's also one of the subheroines in the original game Rune Academia.
I sit down across from her at the table.
And then...
『Kyaa! Look at Naibusu's bedhead! He's so cute even right after waking up! I wanna squeeze him tight!』
Thanks to my special ability, the 'Mind Rune,' my sister's thoughts flow straight into my head.
"Did you prepare properly for the opening ceremony? You weren't up all night playing games again, were you?"
But her words come out curt and nagging.
A complete opposite from what she's thinking.
"...Yeah."
And I match her tone with my own curt reply.
My special ability is the 'Mind Rune.'
It's also known as a lie detector.
The Mind Rune is originally supposed to vaguely sense the psychological state of anyone you touch.
It doesn't help much in combat and is only useful for checking the heroines' affection levels toward the protagonist and reporting them back.
Honestly, it's not a great ability.
But after being possessed by Naibusu, I'd trained it relentlessly, without a single day off.
To survive.
To protect the people around me.
And... to avoid getting 'corrupted as a female.'
The world of the original game Rune Academia is brutally harsh.
Every female character has an assault ending, and if you take the wrong route, characters die left and right.
And... even I, as a male character, had an assault ending.
So to protect my virginity(?), I had to get stronger no matter what.
Thanks to that grueling training, now I can read people's thoughts just by being near them—no contact needed.
I don't want to eavesdrop on my sister's feelings... but at this distance, I can't help hearing them.
"If you keep playing games every day, you'll turn into an idiot. I don't want to hear people saying the teacher's little brother is a moron, so study a bit. Learn from Yuuki."
Kurosaki Yuuki.
My next-door childhood friend and the protagonist of the original game.
At first, I resented that Yuuki.
She has powers but acts like such a naive idiot that she lets all the girls around her get stolen away.
If you think about it, I died young from high blood pressure and ended up possessed here because of Yuuki.
But after the possession, I realized how good of a person Yuuki is.
The original heroines weren't into her for no reason.
And Naibusu from the original story didn't support her from the shadows for nothing.
"...Yeah."
I brush off my sister's words with feigned indifference.
In truth, I don't play games anymore.
I'm skipping sleep to train, pulling all-nighters every night.
But I can't tell my sister that, so I use late-night gaming as an excuse.
『What if Naibusu thinks I'm a nagging, annoying sister? But Mom and Dad are gone, so I'm all he has. I have to raise him right!』
My sister's thoughts come through again.
I know she worries about me. That she genuinely wants what's best for me.
But to protect a sister like that, I can't slack on training.
"...Is the food okay?"
"Yeah."
『Phew. Good thing. I wasn't confident about the miso soup. I rushed the broth too.』
"...The miso soup is especially good. The broth is rich."
"Really? Ahem."
My sister smiles happily for a moment before clearing her throat and reverting to her stern expression.
Since I can read her thoughts, I know she's deliberately strict with me.
So I have no complaints about her attitude.
"Well then, sis, you head out first. Put the empty dishes in the sink when you're done."
"Yeah."
Naiad sis is an English teacher at Rune Academy.
She's also slated to be me and Yuuki's homeroom teacher this year.
I don't know class assignments yet, but that's how it was in the game.
Probably no mistake.
『Gotta hurry. I lingered looking at Naibusu's face and now I'm running late.』
My sister finishes eating first and takes her empty dishes to the sink.
That's when it happens.
"Kyaa!"
In her rush, sis slips.
Time seems to slow down.
My nerves, sensing danger, sharpen to the extreme.
Sis's body tilts forward, and the empty dishes she's holding float into the air.
Right now, the scene looks like it's in slow motion to my eyes.
I spring up from my seat, supporting sis with my right hand.
With my left, I catch the falling dishes one by one.
Clink, clink, clink—the plates sis nearly shattered stack neatly in my left hand.
"Sis, you okay?"
I let out a sigh of relief and ask her.
Sis didn't fall, and the plates are intact.
This is the fruit of my training.
Even I have to admit it was perfect movement.
『Naibusu's hand is on my, my, my chest!? And his hips on my butt too?!』
...Hearing sis's thoughts, I realize too late.
That our current position is dangerous.
In trying to support her, my right hand had 'unfortunately' grabbed her breast.
My hypersensitive body, amplified several times over, picks up the texture vividly.
Plus, sis's suit skirt is flipped up completely, fully exposing her lower body wrapped in black pantyhose.
And 'unfortunately,' my lower body is pressed right against that exposed butt.
...How the hell does a position like this even happen?
All I did was try to support her!
"...Sorry, sis. Can you stand?"
In my haste to support her, my body's twisted, and the stack of plates in my left hand feels unstable.
If I move rashly, they'll fall.
"W-Wait a sec."
Sis struggles to stand but, tangled up with me, can't manage it easily.
Every time she moves, her butt rubs against my lower body.
Her soft breast squishes and changes shape in my hand.
"Ah, nngh...! Haaang...!♡"
...Is it just my imagination, or does sis's voice sound kinda erotic?
『W-What do I do?! Naibusu's thing is getting bigger!』
Who knew romcom laws applied to eroge too.
I stare off into the distance, waiting for this embarrassing situation to end.
A moment later, sis finally stands and hurriedly straightens her clothes.
"Th-Thanks, Naibusu. You saved me. And the plates didn't break."
Sis speaks as if nothing happened, but she can't hide her flushed face.
Her fair skin, from her mixed heritage, makes the blush stand out even more.
And it wasn't just sis.
As a guy, it shows in other places too.
"N-No, glad you didn't get hurt, sis."
I quickly sit down to hide the obvious bulge.
『What should I do! I can't face Naibusu! What if he thinks I'm a weird sister?!』
That's unnecessary worry.
Sis is perfectly normal.
What's weird is this world, not sis.
Trashy NTR assault game, Rune Academia.
This trashy world draws its female characters as attractively as possible to gut the player's mental state.
The more appealing the character, the harder it hits when they're stolen.
In that sense, my sister Naiad Winzer is a viciously attractive character.
A beautiful, kind mixed-race teacher with blonde hair, blue eyes, and overwhelming bust size.
Cold on the outside but warm within, and clumsy to boot, as you just saw.
That's why she has absolute support from the academy's boys... or so the game setting goes.
Well, it's reality now, not just game settings.
『Oh right! Before I go!』
Sis, about to head out after putting the plates in the sink, turns back.
Huh? Me? Why?
"Naibusu, fix your hair before you go. It's embarrassing."
"Yeah."
Oh. It was about my hair.
Sis's slender fingers comb through my hair.
A gentle touch filled with sisterly care for her little brother.
I glance sideways.
Right next to my face are sis's breasts.
Huge ones that make the buttons on her teacher suit look like they might pop.
『Hehe. Such a slob. I always have to take care of him.』
The gentle stroking of my hair,
the mature woman's scent wafting close by,
and the massive breasts swaying right before my eyes.
I know I shouldn't be conscious of it, but I can't help it.
『Naibusu's hair is so soft! Cute! Handsome! I wanna skip school and stroke it all day!』
Sis's thoughts ring in my head.
Pure thoughts that don't match her cold appearance at all.
I'd love to let her stroke me all day too, but today there's an event I absolutely cannot miss.
"...Sis, shouldn't you get going? You're gonna be late for school."
"Oh! Look at me spacing out! See you at school later, Naibusu!"
At my words, sis snaps to and rushes out the door.
Hope she doesn't trip.
Naiad sis.
She's a good sister. Really.
After losing our parents in the Great Catastrophe ten years ago, Naiad sis has worked hard to raise her young brother ever since.
At the academy, she devotes herself to her students, and in the near future, she'll even risk her life for them.
Naiad sis, who's lived her whole life for others.
I absolutely cannot accept such an end for her.
I have to stop her assault ending.
No matter what.
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