The strongest swordsman was disappointed with the world's too low level and reincarnated into another world.

I was in a cave with a few knights.

"This is where the Dark Knights hide..."

They say this is the Dark Demon Emperor's lair.

Really, it's a cave with no weirdness whatsoever.

"Argus, are you sure you're here?

"Oh, seriously, this cave is the stronghold of the Dark Knight"

But this is where the Dark Knights were based.

Frost, the Dark Knight, says, so I'm sure of that.

"Slade, are you ready for your heart?

"Oh, I'm fine"

You worried about what I said yesterday, Faraes spoke to me.

There is still fear of the Dark Demon King in me. But that's not unusual.

Before the battle, I was always less afraid. This time, they're just a little big because they're the kings of the Dark Knights.

"Anyway, I don't know what's inside. We have to be very vigilant..."

"It's where they live."

"Oh, I need to keep it in mind..."

I snort at the words of Sona and Celia.

From here on out, I really don't know what it is.

Enter the enemy's home base. Besides the Dark Demon Great, you'll have to care about a lot of things.

"But you don't have a lot of enemies, do you?

"Oh, ten current dark knights, including me. Five of them have slept for me, and two of them have been deprived of their souls. If you're waiting, it would be most natural for Flore to be the only one. Most likely, Polt and Disoil have been freed from prison..."

That's how Frost answers my question.

There are only four remaining dark knights. Two of them are deprived of their souls.

Hence, Flore is most likely the only one waiting.

"If she says she's waiting, I'll take care of her."

"Mr. Cannon..."

"Chiano, my sister. So, that's the best part, right?

"... Yep"

In response to that word, Mr. Cannon has said so.

Flore is, in fact, Mr. Cannon's sister, by the name of Chiano.

That's why Mr. Cannon wants to fight for himself. He is about to turn his sword against himself to call upon his sister.

"Anyway, shall we go inside? I don't know if I have time."

"Oh, let's do that"

In Faraese's words, I take a step forward.

This is how we entered the Dark Knight's lair.

◇ ◇ ◇

We took Frost's guide down the cave.

In the cave, it was made very intricately and would have been possible to get lost if we had gone normally. The Dark Demon Great had also given me the creation of the interior of the cave, but I'm so glad Frost was there. Thanks to you, I don't think I need to get lost.

"Mm...?

"Ah..."

We walked for a while and we came to an open place.

It's a place so big and so bright that it doesn't seem like it's in a cave.

"You're here..."

In the center of that room, a girl stood.

A dark knight wearing a mask imitating a butterfly. It's Flore, the Dark Knight of the Black Butterfly.

"We can't let you go to the Dark Devil the Great. Here, let me stop you."

"Didn't the Dark Lord want to fight me?

"Yes... so this is my random behavior. I don't want him to die."

To my words, Flore has answered that.

Apparently, what we were waiting for here was Flore's arbitrariness.

In the first place, the Dark Demon King was inviting us. For that reason, stopping eating is a funny story.

"Chiano......"

……

It was Mr. Cannon who stood in front of such a flore.

As promised, Flore's opponent is this guy.

"I don't know what I'm mistaken about, but I'm not your sister or anything"

"That's not true. No matter how many years ago we broke up, we can't possibly go wrong with our sister."

"I don't know..."

Flore, who corresponds to Mr. Cannon, clearly had a different attitude.

Perhaps she is a chiano for sure.

But he doesn't want to admit it for a reason. Is that because she is a dark knight?

"... if you say you're not a chiano, that's fine. But what about the other one in you?

"One more..."

"You obviously had a different personality when I called on you before, didn't you? Maybe that's the chiano, and you're a different personality?

……

To Mr. Cannon's words, Flore leans down.

Probably because what Mr. Cannon said was a diagram.

"... Sure, I have two personalities. Personality as a Dark Knight Flore and just a little girl's chiano. But I'm the one here now. So there's no point in your calling"

"I knew you were my sister..."

Finally, Flore was revealing all the truth.

I suppose you thought it would be useless to hide any more.

After all, Flore was a chiano. No, maybe it's better that it was also a chiano.

"What the hell happened... can you explain it to me?

"Once upon a time, Chiano and you were exposed to dark power by a man. So I got Dark Disease... Dead Butterfly Disease."

In Mr. Cannon's words, Flore began to explain the situation.

Now we can solve the mystery about Mr. Cannon and his sister.

"A man...?

"... Dark Devil the Great. That's who gave Chiano and you the disease."

"Become..."

Flore's words were astonishing.

It was the Dark Demon Emperor who brought disease to Mr. Cannon and Chiano.

"Well, then why did you tell him..."

"It was the Dark Demon Emperor who saved me from being invaded by disease. He took me to sleep in the hospital, and in this Azito, I overcame my illness."

Flore answers Ms Cannon's question pale.

To her, the Dark Demon Great seems to be the cause of the disease, as well as the one who saved her life.

But it's just a selfie. So, she won't have an in-laws who will obey the Dark Devil the Great.

"And I decided to follow him for a reason. It took a lot of years to overcome the disease, and his feelings were sprouting..."

"Love... even though you made yourself suffer from a disease?

"From around there, my personality split into two parts. One is Chiano, who is unsuitable for battle, and the other is Flore, the character of battle..."

Without answering Ms Cannon's question, Flore went on to say the words.

Apparently, her personality was figured out when she had to overcome the disease and fight as a dark knight.

Maybe it was to protect my heart. Has she created a new personality to contain herself from wanting to fight?

"... then, Flore. Now let me speak as your sister."

"Sister? What are you talking about? I'm not your sister."

"You, another chiano. Then my other sister."

"Hey, what..."

So Mr. Cannon spoke to Flore.

To Mr. Cannon, Flore doesn't seem to change being his sister either.

Even if the personality is different, it was created by Chiano. So I guess that's part of the chiano, too.

"Just kidding..."

"I'm serious."

"Soon, I won't be able to hear you..."

From Flore's back, butterfly-like feathers grow.

Apparently, we're starting a fight.

"... as my sister, I will definitely make you stop"

Along with that, Mr. Cannon pulls out his sword, too.

Now the battle of the sisters was about to begin.