Prologue: The Day He Got A Little Sister

1

"Hey—you said that you wanted a little sister, right?"

The night of a certain day near the middle of summer vacation.

Toujou Basara heard his father say that so resolutely.

It was during their dinner—just as Basara stood up to get a second

serving of curry.

"I didn't say that. Did the spice get into the wrong part of your

brain?"

Basara said so wearily over his back, then he opened the lid of the

rice-cooker.

"Such a weak reaction…it's a little sister, you know, a little sister. It's

something guys want so bad that they start drooling."

"I'm afraid that a little sister doesn't fill my stomach."

Like he would go along with his father's antics. He had a great

appetite. The stomach of a high school boy wasn't to be

underestimated. Once he finished loading his plate with the rice, Basara

moved in front of the pot with the curry on the stove. He poured the

substantial sauce over his rice, then returned to his own seat.

"Huh? Where are the pickled vegetables?"

The bottle filled with the curry's relish had disappeared from atop

the table.

His father that sat across from him holding the bottle of pickled

vegetables in one hand and said with a triumphant look on his face,

"Hey, let's talk a bit more enthusiastically about a little sister."

He showed a smirk. Basara made a sigh of resignation and looked at

his father—Toujou Jin. That father at a good age tried to discuss the

merits of a little sister with his son over dinner.

Putting it into words was quite painful. He felt a slight killing urge.

"Enthusiastic…actually, did I really say I wanted a little sister?"

"What…you don't remember?"

Jin said astonished.

"You said 'I want a little sister', which sounds like a light novel title,

with sparkles in your eyes—about ten years ago."

"Like I would remember that!"

Ten years ago, Basara was still 5 years old. Without a doubt, it had

only been childish nonsense. However, Jin put up a hand with "Calm

down".

"A little sister is nice, cute, kind and soft. She'll wake you up in the

mornings."

"Well, that might be…"

"Yeah. Besides—you can do all the perverted stuff you want."

"Don't tempt your son into crimes! Actually, it would be scary

instead if there was such a little sister!"

Such a little sister only existed in 2-D.

"What's up with you, dad…? You wanted to talk about a little sister

that's likely to fall under the metropolitan regulation

that bad?"

"I wasn't really talking about fiction. Though the perverted stuff was

certainly a joke."

Jin passed the bottle with pickled vegetables by sliding it over the

table.

"Well, in short, what I want to say is: Would you like or hate a little

sister?"

"What kind of survey is this? Well…a little sister from a drama or

manga aside, I heard that a real little sister isn't all that great. Like

they're cheeky and crude."

"Then, in other words, you would be fine with a cute little sister."

"Well… Guess so.—Actually, where are these questions leading to

here?"

On Basara's words, Jin replied shortly with, "Yeah, well", then

showed a suggestive smile.

And then, he spoke the words that would change Toujou Basara's

fate.

"Aren't you glad—that you're getting a cute little sister?"

2

Blue, wherever you looked. That was the colour of the sky on that

day.

The weather was nice. The cicadas were chirping like a scream of the

heat, as the temperature reached a new historical record high. It was an

early afternoon in midsummer. Basara had come to a family restaurant

in front of the station with Jin.

"I mean, seriously…?"

Toujou Basara mumbled in a still doubtful tone.

—Last night, Jin brought up the topic of a little sister. That was a flag

for his second marriage.

Because he had picked, "If it's a cute little sister, I like her," from the

choices, they came to meet her right away.

"Stop sulking… When I called them, they said they wanted to meet

and greet you as soon as possible. Besides, I asked you if today would

work for you."

"Well, yeah…"

Certainly. Basara had told Jin, who had asked with his cell phone in

one hand, "I don't mind," as he still couldn't comprehend the situation

and was going with the flow.

However, after taking counsel with his pillow, he ought to think

about it once more after all. Jin getting remarried meant that Basara

would get a new family. And not just a little sister, but he might also get

a mother.

…But.

Yes—that was still theoretical.

Along with Jin, the other family and the girl who was to become

Basara's little sister were also sympathetic to the remarriage. But,

despite that, Jin's remarriage was not yet set in stone. In other words,

…I'm the last one to get convinced, huh…

With the final conclusion resting on his shoulders while all other

obstacles had been cleared, it was a somewhat annoying topic. While

Basara thought of what kind of predicament he was in, an electronic

sound suddenly sounded from the entrance of the restaurant. It

signalled the arrival of a customer. While inadvertently putting himself

on guard, Basara looked towards the entrance and made a sigh of relief.

It had obviously been a different family.

"What are you getting tense for every time a customer comes in?"

"Wh-What does it matter to you…really."

While resting his head on his hands, Basara looked at the newly

arrived family.

—A father, a mother and a child.

It was natural happiness. Thus, something really precious.

Toujou Basara wondered if he could get that happiness, which was

what he wanted at that time.

—But what were the actual conditions?

He didn't know. A family of females was something unknown to

him. But—he might get an answer to that now. By meeting with the

people that might become his family in the future.

—And, he didn't even know himself why he did so.

It wasn't because of the electronic sound that signalled a new

customer, nor was there really anything drawing his attention. Despite

that, as if he was being controlled, Basara—suddenly shifted his gaze

towards the entrance of the restaurant.

"——"

With leisurely steps, two girls entered the restaurant.

One of them was around the same age as Basara, likely a high school

girl. The other one was younger than Basara. Because she was rather

short, she looked both like an elementary and middle school girl.

Those two were likely sisters, but—

"…Uwah."

He unconsciously leaked a voice out of surprise. He had seen a cute

girl on the street before. He also had inadvertently stopped and turned

around to her.

But—the girls who had come in completely surpassed that basic

level.

After all, the other customers who had noticed the girls also had

their gazes pinned down on the two of them. Soon enough, the girls

were led away by an employee to a table on the opposite side of Basara

and Jin.

While he looked at their backs—another new customer entered.

It was a woman in her twenties with a peaceful aura together with her

daughter in elementary school.

…Were they finally here?

Inadvertently, Basara stiffened up and at the same time, the two came

closer like they had noticed him.

No doubt. Basara stood up from his seat with attitude to the coming

mother and daughter.

"N-Nice to meet you… I'm Toujou Basara!"

However, the woman in front of him looked at Basara in

bewilderment. She might have been surprised by the sudden greeting.

Basara hastily tried to save the situation. Suddenly, a fist hit the back of

his head.

"Oww! Wh-What are you…huh!?"

"Sorry about my idiot."

Before Basara could turn around, Jin forcibly grabbed his head and

lowered it.

Basara got his body forcefully lowered until he was bending forward,

but still managed to shake off Jin with force.

"Who are you calling an idiot!? To smooth out your sudden

remarriage, I just tried to—"

Then, the mother and daughter passed by in front of Basara.

"Eh…?"

When Basara followed their backs with his eyes, the pair sat down at

the next table—beside a man that was likely the husband. The husband

welcomed his wife and child with a smile, but towards Basara, who had

called out to his wife, he sent a short, strict glare.

…Ehm, in other words.

It was a misunderstanding. To Basara, who was about to explode out

of awkwardness from his painful mistake, Jin spoke.

"You're too nervous…go wash your face and calm down."

"…Sorry. I'll do so."

He said wearily, whereupon Basara unsteadily headed for the toilet in

the back.

…Just what am I doing?

Getting nervous by himself, blowing his fuse by himself, getting

elated by himself.

At that rate, it was unknown what kind of failure he would pull on

the meeting. Like Jin had said, he ought to calm down a bit. While

looking down, he opened the door to the toilet and set a step inside.

"Eh—?"

Toujou Basara raised his face and froze up.

In the opened room—stood a girl.

At that moment, an awkward silence fell onto the small room.

The girl in the toilet was the beautiful older sister from the pair of

sisters that had entered the store earlier.

The girl had bent slightly forward, had rolled up her skirt and had

both her thumbs in her white panties, as she was either pulling it down

or pulling it up. With all thoughts stopped from the sudden happening,

she looked at him dumbfounded.

But it was a misunderstanding. Basara had by no means opened the

door of the female toilet.

The toilet merely was for both genders. She likely had used that

double gender toilet, as the female toilet was occupied. However, that

double gender toilet had a defect that was known to the usual guests—

the lock didn't close properly. Therefore, the girls who knew of that,

avoided using that toilet if possible. The restaurant had even posted a

small notice saying "Please lock the door properly" inside to avoid any

troubles. But even if one thought it was properly locked, it could

happen that it actually wasn't—yes, just like right now. Basara hastily

tried to close the door and turn on his heels—but suddenly he heard a

'certain sound'. It was the sound of the girl taking a deep breath. An

action taken before a scream.

"—Hey, wait!"

"Mmg!?"

Basara narrowly managed to quell the scream and made a sigh of

relief for now.

…Wait, what am I doing!?

Before he had noticed it, Basara had completely stepped into the

toilet and covered the mouth of the girl.

That wasn't good. It should have been an unfortunate accident due

to a misunderstanding, but the situation had worsened so much that

even excuses were useless now.

"Sorry for scaring you, but please—listen to me without making a

ruckus. This wasn't on purpose. It's an unfortunate accident, a

misunderstanding…"

That the occupied toilet door opened from the outside meant that

the person who didn't lock the door properly was at fault. In other

words, the girl; but on an emotional level, she was a victim. Therefore,

Basara explained about the defect of the lock and about the notice on

the door. He desperately tried to convince her.

There was no assailant here, only two victims.

Upon that—as Basara's explanation worked, the girl relaxed her

body soon enough.

"Ehm…I take it that you understand now?"

On his question, the girl gave back a nod. When Basara timidly

removed his hand, the girl corrected her posture and laughed a 'Fufu'.

A bright smile that seemed like a proof of friendship.

Good. Apparently his sincerity was conveyed and she comprehended

the situation calmly. Hooked on, Basara also showed a smile with

"Haha…"

—At that moment, he received an attack to the cheek and was blown

off to the side.

It was a slap. Needless to say, the initiator defect door was unlocked.

Basara bumped into the door and tumbled outside. There, he fell on his

backside.

"Wh-Why…?"

"…Come again?"

While pressing on his cheek, Basara looked up dumbfounded. The

edges of the girl's mouth twitched.

"First you peek on a girl in the toilet, then you get inside, cover her

mouth and try to make excuses… Put a hand on your heart and think

well about what you have done—in the other world."

As if to give Basara the finishing blow, the girl raised her leg and then,

"—Hmm? What are you two doing there?"

That a familiar voice sounded from the side. He had probably come

to check up on Basara as he was late.

Jin had come to the toilet at some point in time.

"Dad…"

"Jin-san…"

Basara and the girl called out to Jin at the same time, then looked at

each other with an, ""Eh?"".

And then—as Basara returned to his seat, now two girls sat in front

of him.

The taller one was Naruse Mio. The shorter one Naruse Maria. Like

Basara had imagined, the two of them were sisters. When they finished

ordering drinks,

"Ahaha, sorry, Basara-san."

Maria showed a friendly smile.

"We properly told the waitress that we are meeting up with someone.

But apparently, the one who guided us to the table didn't know about

you two."

In other words, the shop assistants didn't speak with each other. It

was an elementary mistake.

The puzzle had been solved. However, it didn't necessarily solve the

'problem' as well.

"…"

In contrast to the smiling Maria, Mio was puckering her lips,

wordless for a while now.

…Well, it's understandable.

To tell her to brighten up when someone interrupted her on the

toilet earlier, would be asking too much. It left the worst first

impression at the important meeting for the two remarrying families.

The remarriage wouldn't be cancelled because of this, but——Basara

once again checked upon the expressions of Mio and Maria, who sat in

front of him. And he thought,

…Still, they're cute.

Not the appearance alone, but their aura and casual behaviour made

him excited. Especially Mio, who apparently was also a first year in

high school just like Basara, albeit with a later birthday. In other words,

right now, when their parents hadn't remarried yet, she simply was a

girl of the same age as him. Of course that accelerated his heartbeat.

Then,

"—But, I'm glad that you're a nice person, Basara-san."

Maria, sitting diagonally opposite to him, faced him and laughed

with an 'Ehehe'. She looked very young for a girl only one year younger

than Basara and Mio and in her third year of middle school. Her

cuteness stimulated a boy's protective instincts gravely.

"I was worried about what to do when meeting a boy of your age, as

you could have been sharp as a knife."

"Ha, Haha…"

An age where you were sharp like a knife, just what kind of age was

that? The one of a national reaction entertainer?

"No need to worry. I mean, he seems to fancy a cute little sister."

"Seems so. I mean, he came into the toilet occupied by a girl."

In response to Jin's light joke, Mio sent off a cold glare.

"I said that was a misunderstanding, an accident. How often do—"

"Hmp, still making excuses?"

When Basara let out a sigh, Mio bent slightly forward.

A distance that made his heart skip a beat unmeant. She looked at

him with superb upturned eyes that emphasized their height difference.

"…..I'm sorry."

So weak. When Basara, unable to endure her destructive force,

apologized, Mio nodded "Mm, I forgive you" satisfied and finally

brightened up her expression. Basara made a sigh of relief.

"Oh right… ehm, excuse me, there's something I want to ask."

There Basara suddenly spoke out a simple question.

"Where's your mother? Will she come later?"

The prospect of getting a little sister, and even these two cute ones,

had surprised him.

But well, Jin had never said that it would be only one.

However, their mother, who Jin was going to marry, was absent,

which made this meeting pointless.

"Yeah, reminds me, I didn't tell you…"

Jin said.

"Their mother—Chihaya-san is currently overseas for her work."

"......…Huh?"

Wait a moment. What did his father said just now? As bad as it

sounded, the marriage partner was currently overseas?

"…. Aw… Dad, lend me your ear for a sec."

Grabbing Jin's arm, Basara moved to a place where their voices

wouldn't reach Mio and Maria—to the corner of the walkway.

"…Sorry, but could you say that again?"

Basara crossed his arms and tapped with the index finger of his right

hand on his left upper arm.

"Mh? 'Hey—You said that you wanted a little sister, right?' That

one?"

"How far are you going back! I meant about the stuff about your

marriage partner being overseas!"

"So you heard it after all. What about it?"

"It's weird that on a meeting for a remarriage, she herself wouldn't

show up!"

Even more so when they were the ones that wanted to meet as soon

as possible. He wasn't going to blame her for going on a business trip,

but a meeting without her was pointless. Actually,

"I hope I'm wrong, but… you're not getting tricked, are you?"

"Haha. No, don't worry. Besides, do you really think I could be

tricked?"

Certainly. If anything, he was the type to trick, this phony father.

"But then we could just have done the meeting once she came

back…."

"I'm afraid there's a reason as to why we better hurry up."

Jin changed his expression from a smile into a serious one.

"Basara… Now that you saw these two, what do you think?"

"What are you asking… Well, cute, I guess."

At any rate, he thought they were some kind of idols when he saw

them at first. So…

…A reason to hurry up, huh…

Judging by the conversation, Basara finally came to understand that

reason. The prospect of remarriage meant that they were a family of

just mother and daughters. And that mother was currently overseas on

a long time business trip.

"I'm sure a parent would worry if these two are all left by

themselves… Is that why?"

"Yeah. Actually, the two of them seem to be under the attack of

some suspicious person. When I first met them at the city, a weird guy

was picking on them. Besides, there also seems to be a persistent

stalker."

"For real…"

The world sure was dangerous, but to think there were actual

casualties. It certainly was a pressing matter. The police didn't interfere

with personal matters. They wouldn't move unless something

happened, which would be too late.

"I heard that Maria-chan stopped going to school because of that

stalker. Those who want to go to school can just do so, but for

someone who can't, it's painful. Even if she's smiling so brightly right

now."

Jin said.

"Well, for these reasons, I would like us to start living together

already, if you have no objections. They also say a remarriage is more

likely to work out if you know each other better beforehand."

"You mean to temporarily take care of them and see if it's possible to

live together as a family?"

"This is some kind of destiny. If we can protect them, then you

would like to, right?"

On Jin's words, Basara fell silent. It was a silence of affirmation. And-

…Mh?

Suddenly he made eye-contact with Mio on the other side. Like the

earlier forceful attitude had been a lie, she had a worried expression.

Basara narrowed his eyes and asked Jin besides him.

"—For how long?"

"For starters, a year. It might turn out we're totally unsuited to live

together or reach a conclusion about the remarriage, but—They will

only get back to living alone once a certain level of their safety is

guaranteed. I wouldn't be able to sleep anymore if I were to hear that

something happened to them."

He had a point. When their mother comes back in a year and it was

time to decide about the remarriage, it would all fall apart if something

had happened to Mio or Maria.

More importantly—Basara himself didn't want Mio or Maria to

suffer.

"But where are we going to live? Our house doesn't have any rooms

to spare."

"We'll rent a suitable one. I already have my eyes on one. We should

create an environment as close as possible to a family, since we're trying

to find out if we're compatible. And it'll quicken things if we actually

do get married."

"…Do these two know about the living together?"

"Yeah. They would gladly do so, if you agree."

On Jin's words, Basara stayed quiet for a while. But, soon enough he

mumbled slowly.

"...Okay. It's something you decided, Dad. So I'm fine with it."

He wasn't just being amiable, those were his true feelings.

"I see. Sorry for not telling you anything and proceeding on my

own."

"It's fine. You must have your reasons for doing so."

He could just tell him everything once he was able to.

He and Jin were blood-related child and father, but their trust in each

other was far beyond just that.

Ever since the time when Basara had caused that problem—the time

when he threw away everything to protect him.

"Let's get back, Dad… Or they will worry."

Saying so, Basara returned to their table with Jin. When they sat back

down,

"…Uh-Uhm,"

with a timidly tone, Maria tried to confirm their state of affairs.

"Ah, sorry… Just some talk amongst men."

"He made such a serious face that I was worried about what he was

going to say, but then he said 'These two are so cute that I can't

suppress my arousal'. Geez, boys in their puberty sure are horny."

"Hahaha. Dad, that will have an afterpiece."

An afterpiece about fists at night. Just with him and his father.

And then, to Mio, who looked just as worried as Maria,

"I was surprised by all the stuff I heard yesterday… But, it's all right

now."

Basara said.

"Until your mother gets back and even though we still don't know if

the remarriage will work out… I think it's a good idea to try out living

together as a family before instead of just suddenly remarrying. Let's

slowly get to know more about each other."

"…Really?"

Mio asked uneasily, whereupon Basara nodded with a "Yeah."

"We're a men's household, so having girls around really helps…

Right, Dad?"

"Right. Besides, I always wanted a cute daughter. Basara also pestered

me forever about wanting a little sister. So don't show any reservation,

you two."

"Thank you." "Yay, please take good care of us."

Mio and Maria quickly lowered their heads. And then-

"Well then, take care of me, Basara-kun."

Raising her head, Mio gave him a smirking smiling face.

"But—if you happen to come into the toilet again, I'll kill you a

hundred times over."

"...Yes."

Her eyes were serious. When Basara's expression stiffened up, Jin

summed it up.

"Okay then…. let's get along as family from now on."

This declaration made with a smile was the beginning of a new lifestyle.

"Issues might arise, but—let's become happy together."

Therefore—even though prospects for a grim future hung somewhat

in the air, it still felt peaceful.

Same for Toujou Basara's every day life——and for the world.