Original subtitles

The Shiunji Family Children

We siblings could get married now, I guess?

K-Kotono?!

Wha? Get married?

Cut it out. That's so gross.

Hypothetically, I mean.

The law doesn't forbid marriage between two siblings not related by blood.

And I'm saying the very idea is gross as hell.

Is this the kind of thing you normally think about, Shion?

Goodness, no!

My thoughts are only ever filled with gratitude for having such a pretty and kind big sis.

Again with the flattery...

But, yeah, I wouldn't put it past Erota's dirty mind.

He's been looking at me funny lately.

And it wasn't long ago that he said I was dressed too lightly.

Tell him how gross that was over and over until he gets the idea.

Give Shin-nii a break. He's a hormonal teenage boy.

That reminds me. What exactly happened with Kotono?

Huh? You mean the thing in the game room?

We found him on top of her when we got there.

Did he tell you anything?

Yeah, but he swore me to secrecy.

Listen, even we know he isn't enough of a horndog to force himself on her.

We only joke about it.

There had to have been a reason behind all that.

How sharp.

What? She said she liked him?!

Kotono told Arata that? For real?

According to Shin-nii, yeah.

And keep it down, will you?

So what'd he say?

Turned her down, of course. Brother and sister and all.

But Kotono apparently wouldn't take no for an answer.

She started clinging to him, and he was trying to get her off when that happened.

You can't be serious.

Although Kotono does tend to do unexpectedly wild things at times.

My head hurts.

He couldn't explain himself because it might've hurt Kotono if everyone knew.

But if it's true, this is pretty bad news.

They're siblings.

Hey, Kotono might just be confused.

Not uncommon for kids that age to mistake affection and respect for romantic feelings.

"Kids that age"? You're only a year older than her.

And you're only two years older, Ouka... oneechan.

Though, uh...

Yeah... I know where you're going with this.

If she's for real, things might be about to get a whole lot worse.

K-Kotono?!

Wh-What are you doing?

I love you.

Are you out of your mind? That's just so wrong!

But why?!

Tell me... Why?

Th-That should be obvious.

I did a web search for "siblings not blood- related marriage," and I know what I saw.

Am I a bad girl?

No, you're not.

Lots of teens get confused about their feelings for someone they're close with.

But I'm not confused...

Either way, it doesn't matter that we're not blood-related.

I'm your big bro. It's my job to ensure your happiness in life.

And I'll look after you until the day I see you walk down that aisle.

I'm going to forget this ever happened. You go take that bath.

You're the nicest person I know...

and the meanest.

Happy birthday.

I wish you'd tell me when this stops being "confusion" and becomes something more.

Well, I kept my promise to her.

Come in.

So it is you...

Banri.

Man, I can't believe what Kotono just did.

Did Dad's talk cause all that?

He says we're not really siblings, but I can't flip that switch just like that.

Nothing changes. Not one thing.

S-Seiha?

What, you walk into the wrong room and sit down like you own the place?

Well, if you've got anything to hide, you ought to lock the door.

How very careless. Where were you?

Huh?

C-Crap, I can't say I just came back from the bath.

J-Just talking a walk, I guess?

In your own home? Fat chance.

Wh-Who cares? What's up with you, anyway?

What are you doing here this late?

Your room is always so plain.

You have the smallest room out of all of us, but it feels bigger than it is.

Do you remember?

We played rock-paper-scissors to decide room assignments when we were around ten,

and Ouka won the biggest one.

And I came last. I sure do.

Lucky you're not much of a hoarder, huh?

So you're livestreaming a tour of a boy's room? Is that it?

I can't say I'm too into streaming culture.

Our second oldest, Seiha. What does she want?

Does she want to talk about what Dad just told us?

She doesn't really strike me as the type, though...

Huh? What?

Excuse me.

Wha?

Whoa!

What're you doing, you moron?!

Hold up!

Quiet, please. This has to remain top secret.

T-Top secret?

What?

What the hell is going on here?

Why'd she just get on top of me?

I didn't know she was like this.

She stopped being physical a long time ago.

Is she getting weird ideas like Kotono, too?!

Good. No real concerns here.

What do you mean? What concerns?!

I saw you in the bath with Kotono just now.

What? Wait, she saw that?!

I love you.

H-How much did you see?

All of it, probably.

I went to take a bath and overheard you two inside.

A-A-A-All of it?!

Wait, get off me first!

I had a faint inkling about Kotono's feelings for you.

But it's not unusual for young teens to mistake their sibling affection for love.

So I thought nothing of it.

But perhaps what we were told today broke all her inhibitions.

I thought you handled that situation as well as you could as the oldest son.

But, given the risk of it continuing to happen,

I wanted quantifiable proof that you wouldn't succumb to any approaches from us sisters.

I see. So she did it to keep our sisters safe?

You know you could have done that in a less direct way?

Well, considering I have zero romantic interest in you,

this was the easiest approach.

Anyway, don't be ridiculous. She's my little sister, you know?

Do you know why incest is banned in Japan?

Huh?

Article 734 of the Japanese Civil Code prohibits marriage between direct relations.

However, this is largely due to social customs.

The feelings of the individuals involved are not taken into account.

Biological theory also says parents with differing genes produce healthier offspring,

and we evolved aversion to familiar scents and the rebellious phase to prevent incest.

But none of that holds any meaning after tonight's dinner.

So how long will the word "incest" be enough to keep Kotono at bay?

I find the risk too large to ignore.

Th-That doesn't excuse what you did.

Even marriage between cousins isn't unheard of.

Outside of Minami and Shion, none of us are exempt now—even you and me.

We may be siblings, but we're not biologically related.

So it's certainly possible for us to have sexual relations.

Come on! S-Sex...?!

I'm merely stating the facts.

While I personally hate the idea of ever being the subject of your libido...

Huh?

It wouldn't be entirely unnatural for it to happen, biologically speaking.

Perhaps Kotono had instinctively picked up on that all along.

Give it a rest, Seiha.

Anyway, I'm glad that your pulse remained normal throughout.

Also, while it may only be on paper now,

I am technically your older sister, so watch how you address me.

At the very least, call me something cute like "Seiha-chan."

See you.

What the hell was that all about?

I get where she's coming from, though.

I have these sisters with whom I'm not blood-related.

Shion would say that's a situation straight out of a light novel.

The difference is, I've spent sixteen years living as their brother.

That's not gonna change overnight.

No real concerns... right?

Oh, Seiha.

Whatcha doing over here?

Nothing in particular.

Way too much for one day, I swear.

It's like waking up on the wrong side of the bed.

Check it out, Arata! Lovely, isn't it?

Why the heck are you dressed like that first thing?

The uniform for my practicals just got delivered, so I'm trying it on.

Kotono's wearing the spare.

Boys love this kind of thing, right? What do you think?

Take your breath away?

Th-That's entirely subjective!

Looks like Arata doesn't like us! I'm so sad!

That's not what I said, and you know it!

Do you like us, then?

Wh-What are you asking your brother?

I-I need to get going to school, Onee-chan.

Right. Better hurry up and change.

Doesn't have to be out here!

Have a nice day!

I think Banri-chan was trying to lighten the mood after last night.

Yeah, maybe.

Whoo, they've got legs for days.

Getting to see this in the morning is a sign of good luck, you know.

They're not tarot cards!

Why do I see sparkles in the air around them?

They smell so nice.

Like you can tell all the way out here.

And they say the oldest and youngest are just as hot.

What is up with these sisters?

Talk about a miracle.

I wonder how people would react if they found out they're not really sisters.

Shut your mouth.

I'm just joking.

Well, it ain't funny.

You think girls really are better liars than us?

I mean, knowing what things are like at home gives such a different perspective.

Even Kotono went to school like nothing happened.

They can't be feeling that way on the inside, but look at them now.

Our sisters really are impressive in every single way.

Arata Shiunji

Yeah, I guess I was never going to get over it overnight.

"You're not actual siblings," huh?

It doesn't feel real at all,

but it's reality all the same... right?

You think girls really are better liars than us?

Even Kotono went to school like nothing happened.

They can't be feeling that way on the inside...

Whether Shion knew it or not, they actually were shaken up.

That said, we're still siblings.

Nothing's gonna change. Not one thing.

Oh!

Heya, Shin-nii.

Hey, Minami. No practice today?

Nope! For the first time in millions of years!

The fourth oldest, Minami.

I haven't been here at this time in ages. I'm always on the court.

The brightest and cheeriest of the sisters,

an easy-going girl who can have fun doing anything.

Whatcha starin' at me for? Wait, do I have crumbs on my face?

Nah.

Anyway, I can't imagine the pressure you must be under from your coach and stuff.

A three-peat of the middle school tennis championships...

And they call you a future Olympian when you're this tiny and slender.

Hey, I'm only doing this 'cause I like it.

Loving what you do is a talent in itself.

I envy you because I don't have anything like that.

You're plenty athletic yourself.

Yeah, but you're on a different level.

There she is!

Come on!

M-Minami-chan! Could we take a pic together?

Oh, sure.

Wow, your skin's even prettier up close!

I cut my hair short to be more like you!

I'm rooting for you in tennis, too!

I hope you make it to the Olympics! I'll be cheering for you!

Th-Thanks.

I saw your photo spread and interview in the sports mag, too!

Thank you!

I'm so happy, I could die!

Found my forever lockscreen!

Who were they?

My fans, I guess?

The pic I took in a boys' uniform when I'd just enrolled here made the rounds.

So I've been super popular with the girls lately.

Don't hog all the love from the ladies, too!

What's that mean?

Just talking to myself.

Anyway, you heading straight home?

But it's your first evening off in forever. Maybe go have some fun first?

Well, about that...

Wha? You flunked your class placement tests?!

Yeah... So Coach told me I could skip practice today.

Yeah, to study.

I did what I could...

She's among the best athletes in Japan,

but her exam scores are by far the worst of the Shiunjis.

Yeesh, very well.

Your big bro will tutor you.

So...

You plug in the formula from Q1 here.

Ah, I see, I see.

Sister or not, she's got a real pretty face up close.

What's this "permutations" thing here?

Oh, that?

It refers to the number of unique arrangements you can make of a subset, r, from a set, n.

The key point is that AB and BA are considered different permutations.

I get it now! Trust you to know, Shin-nii!

Wanna try solving a basic problem set, then?

Okay!

How did you get so many of these wrong?

I guess I didn't really get it at all.

I always found it strange that she was the only one with such poor grades.

I didn't expect this to be what convinced me that we're not really related.

Here we go!

Don't queue up a song! You're supposed to be studying!

I got nothing, nothing, nothing but tennis to live on!

Huh?

I can't study! I'm no good at it!

What's with those lyrics?

Funny, right? I got it from a friend.

All I'm good at is waving a racket around.

Way too relatable to your life.

Whoa, she's taking me along for the ride.

I got nothing, nothing, nothing but tennis to live on!

I can't study! I'm no good at it!

Sheesh. Minami always seems to be having so much fun in life.

All I'm good at is waving a racket around.

With how free-spirited she is, I can always be myself with her.

She might be the most fun to spend time with.

Whew, I sang up a storm.

We didn't come here for karaoke.

Man, that was fun!

Uh, it wasn't supposed to be.

We went there to study, remember?

Anyway, last night was crazy, huh?

Huh? Right...

What do you think about the news?

Hmm... I can't think of a reason Dad would lie to us.

So now we gotta wonder who our real parents are.

We'll have to talk to him again and ask for more details.

That makes sense.

She's got a good head on her shoulders with these things.

I'm worried about Kotono. She's the youngest.

And she has quite the delicate side to her.

She's a good big sis, too.

Well, I guess this means you weren't really my big bro.

Just an older guy in school!

Hey, now. Don't joke around about that.

And keep your voice down.

Hey, it's not like what we call each other really matters.

I believe that the bond we've built over the past fifteen years is what's really valuable.

Yeah, she takes everything on the chin.

So...

Don't get down on yourself even if the girl you like has a boyfriend.

Huh?

Wha? H-How did you know?!

Ouka told me.

Just how much of a blabbermouth is she?!

I know so many things that make you great, Shin-nii.

You're smart, funny, responsible, and you love your siblings with all your heart.

So come on...

Wh-What?!

Cheer up, Senpai!

Hey.

Don't walk backward. You're gonna trip over.

Let's play a beat-em-up once we get home.

Think the game room will be free?

I guess we could just get everyone there involved.

Uh, no. Hit the books.

Come on!

Here.

Whoa! The mini cake set from Shingetsudo!

What's the occasion?

I got it for you. Along with this.

My AirPods...

I found the missing one in my clubroom. Sorry about that.

Fine. I'll accept the bribe.

In return, you can have this.

Huh?

If you're okay with hand-me-downs, that is.

But don't go losing them again, got it?

Yeah, got it!

Let's go downstairs and eat these together. It's too much for me alone.

I'll make some tea.

Yay! Dibs on the rare cheese strawberry cake!

What? I wanted that one, too!

Gotta get 'em with the serve, just like in tennis!

The heck? That doesn't make any sense.