The IS Butei Inspector

An Infinite Stratos x Aria the Scarlet Ammo fic

Prologue – The World We Live In

What are the chances that your life would take a surprising twist one day out of the blue?

It happens a lot in fiction, like an ordinary person being chosen to do some heroic by some stranger, or a person finding out that there's something special about them and they have to find out why they have this special trait. Most of the time it tends to lead the person on an adventure where they meet other people and end up in something that's larger than life.

Too bad that doesn't really happen in today's world, which is probably why many tend to fantasize about things like that. I admit I'm one of them, but I'd prefer to keep stuff like that in fantasies. I mean, if something like that really happened to me, I'm sure that I'd really be freaking out most of the time in one spot. As much as I like stuff from fantasies, I value my normal life just as much.

Still, I can say that I, Jun T. Arisawa, haven't had a normal life for ten years, due to a health condition. It's only been a few years that I've been back to full health, and I plan to enjoy every minute of it, or at least until I finish High School…


"…And in other news, the Underground Weapons Market case has been solved thanks to the efforts of both police and Butei personnel, though witnesses say that IS Butei Inspector Tsubaki was on the scene…"

Probably another case that was actually solved by Tsubaki with help from the other forces, though if she was actually called in, they must've needed a lot of firepower. From what I know, over half of her assignments are related to her being the 'muscle' in certain cases. She certainly takes many bodyguard assignments…

This is the world I live in, where people called Butei go around solving cases and catching criminals to help reduce the crime rate around the world. There are also these things called Infinite Stratos, or IS for short, those mecha musume looking suits that outclass all modern armies and can only be used by women. But to be honest, neither of those things really matter to me, since I'm just a regular first year high school student that's going to become a second year in a month, but I'm not looking forward to those exams...

…click…

"I'm home!"

"I'm home Onii-chan! Are you in?"

"Welcome back Rina, Sera. I'm just in the living room watching TV."

Looks like my little sisters came home first as usual. Looking at the clock, it's already past six, the normal time my twin sisters come home from their club activities. I don't go to any, so I'm usually home first.

"Nii-san, where's dinner?"

"…I haven't cooked anything Rina. Mom called in earlier and said that she was bringing something home."

"Really? It's been awhile since Mom did that."

"No kidding Rina, Mom only brings something home when something special happens."

My little twin sisters, Rina and Sera. Rina's the elder one, and Sera's the younger one just to clarify, and they're identical twins. Both have long, waist-length jet black hair that's the same color as mine, but have dark green eyes that they got from our mother. The only way to differentiate from the two of them is the ribbons tied to the sides of their hair, with Rina's red one on the left side of her head and Sera's blue one on the right side of her head.

Anyway, these two are in their second year of middle school going onto their third term, and they're quite popular due to their looks.

If there's something that troubles me about them, it's that they are, uh, growing up way too fast for my taste. They must get that from Mom, gawd how many time's she's mentioned it when she talks about her childhood…

"I'm home everyone!"

Speak of the devil, she's home with food since the smell is already waffling through the house, though I'm surprised that she's home already. Usually she's home half an hour later, if she's not working on a case.

"Welcome home Mom."

The three of us greeted our mother at the same time as Rina and Sera went over to see her, while I just stayed on the couch watching the news. However, what I heard next would surprise me.

"Ah Mom! What happened to your arm!"

Rina's shout made me sit up rigidly when I heard it. What the heck happened out there Mom?

I got up a second later and was about to head over myself to see what was going on when I heard Mom's voice.

"Don't worry girls; I just fractured my arm while I was out on my last case. Anyway, where's Jun?"

"Onii-chan's in the living room watching TV right now."

"Right," That's when Mom's voice got louder as she called out to me. "Jun, come get this and help your sisters set up the table please?"

"Alright, I'm coming."

The first thing that I see when I reach the foyer is Rina and Sera fussing over Mom, who's left arm is wrapped in a cast, more specifically the lower arm. Looks like Mom's getting a bit flustered at all the concern she's getting from the two so they don't notice me approaching until I picked up the bags and poked my little sisters in the head.

"Hey now, let's get the table ready and let Mom relax for a bit, okay?"

"Hai Nii-san/Onii-chan!"

Our mother, Haruhi Arisawa, is a Butei Inspector, one of the top inspectors for the Kantou Butei Agency. Having long brown hair and green eyes, I can say, along with others that know her, that Mom doesn't look her age. Simply put, she's in her late thirties, yet looks like she only in her mid-twenties, being one of those youthful moms you tend to find in anime and manga. Still, she's quite strong, being an A rank Butei in fighting strength, but her real strength comes from her brain. I remember people saying that she's a genius when it comes to her smarts, or something along those lines. Mom doesn't like to talk about it very much.

After the three of us managed to set up the table and laid the food out, the four of us sat down to eat. As always, Mom starts up the conversation whenever we have dinner.

"So, how was your day Rina, Sera? Did you two do well on your exams?"

"I think I did well, though there were a few subjects that were tricky for me. What about you Rina-nee?"

"It wasn't bad, everything was covered. Still, I think there are a few places where I might've messed up…"

"I see… How about you Jun?"

I had a piece of tempura in my mouth, so I had to finish eating it before I spoke. Still, the way their attention is suddenly focused on me while eating is a bit unnerving, like I'm gonna say something mind-blowing.

"Well…I pretty sure I did okay. I still have a bit of trouble with Japanese writing, but nothing too bad… Everything else was alright."

"I see…it looks like everything is going well at Seitetsu then."

Mom has a satisfied look on her face when Rina decided to pop the question. "Mom, how did your arm get fractured? I thought that you had protection."

"Well, it was during the firefight that it happened. I got taken by surprise and despite the shield, an anti-tank bullet somehow managed to hit my gauntlet arm with enough force that my bones cracked in two places." I notice Mom wince slightly as she patted her cast. "The Doctors say that it'll take a few months to heal, give or take, so I'll be home from now on."

Watching Mom eat one-handed, I turned to Rina and Sera, who have bemused looks on their faces. Knowing Mom, she'll be busy with her other 'hobby' during the healing period, though I must wonder how she'll be able to operate a computer with one hand…

"You know, if Marina were here, she'd volunteer to take over for you in an instant Mom."

"I know Sera, but she's still over at Butei High, and I can't just pull her out for something like this."

"Still, it's been awhile since we last saw Marina. I miss her having around."

"I know Sera, but I know that out of all of us, Nii-san misses her the most. I know that he misses cuddling with her, fufufu…"

What?-!

The moment I heard that, I started choking on a piece of fish that went down the wrong tube, and it took a moment of coughing and hacking to clear my throat. When I gulped down some water I looked at the twins, who had mischievous looks on their faces.

"That was a long time ago you two," Looking at Mom, I could see that she was trying to hide her amusement, and was failing miserably. "Not to mention that it was only for a few months after she moved in!"

"Aw, don't worry Onii-chan, you don't have to hide it from us. In fact, if you ever feel lonely, you could always sleep with us."

"Now, now girls, you shouldn't tease your brother like that. He's in that stage where 'it' can come out, so keep the teasing at the minimum. Although…Kinji is an exception."

"Yes Mom~!"

Thanks Mom, you make it sound like Kinji and I are sexual deviants if pushed too far. As if I would be turned on by my sisters…

No, don't think about it. I said don't think about it! It's wrong, just plain wrong, and it only happens in doujinshi as far as I'm concerned!

"Onii-chan, are you alright?"

"Huh? Oh, ah…I'm fine Sera, just bit my, uh, tongue just now…"

"…If you say so Onii-chan."

"I bet Nii-san was thinking of a hot and steamy threesome with Marina and Shion-san."

"RINA!"

I kept my mouth shut after that as we finished eating dinner, with Mom talking with Rina and Sera about girl stuff. That left me to take care of the dishes, which gave me time to calm myself down in front of the sink. Seriously, they may act like little angels in public, but deep down, they're hardcore mischievous. Kinji can attest to that.

Still, this is my family, and I really wouldn't have it any other way. On the other hand, I really do wish that they would stop teasing me so often…


You know, for as long I will live, March 21, 2020 would be a significant date for me.

It's because that day would be the last day of my normal civilian life. And all because Mom would ask me something that would be utterly ridiculous the next day.

Not to mention that it would open my eyes to the true craziness of the world that we live in.