When I woke up in the morning, I couldn't believe what I was seeing.

　I found my sister and Kaori in the living room of the mansion.

　Kaori was sitting on a chair, and she was letting her sister comb her hair.
　........Yes?

　Wait, wait, wait, it's a dream, it must be a dream.
　And the proof is in the pinching of my cheeks.

Eeeeeeeeee?
'What?　Oh, Hermes. Good morning.
Oh, good morning.

　Her sister smiled calmly as usual, and Kaori sat down and raised her hand to greet her like a cheerful child.

''........What do you mean?''

　Once again, I can't believe it.
　Like the fact that her sister and Kaori are getting along so well, but that stormy Kaori is honestly letting her sister comb her hair.
　What the hell is going on here?

Um... waitress?
Something Hermes.
Why are you enjoying your merry way with the Demon King?
Your language is weird, Hermes.
No, it's more than just the language.
Why are you with him?　It's, you know.
Hey,

　They tilted their heads from side to side like two best friends who had hit it off.
　Godd*mn, they look a little cute.

'No, I mean, can you explain it to me so I can understand?
I understand. You see, my niece is a very intelligent girl.
'Niece?　Oh, right, I'm your nephew.

　Kaori has been around since the first generation of the Cano family was around, and Kaori's father is the same person as the Cano family - my sister and I's grandfather's grandfather's grandfather.

　So I'm my nephew's grandson's grandson's grandson - so my nephew and Kaori are called nephew and Kaori.
　Then, as a matter of course, the sister becomes my niece.

That's great, but am I being understanding?
I said you can stay here as long as you want.
'What?　W-why?

　I look at my sister in surprise.
　The sister, in contrast to me, started to speak with a blank expression on her face.

"Hermes is the counselor of the Demon King, the equivalent of a grand duke, right?
Oh, yeah.
That is, my man.
Is that right?
"A man's home is as good as his master's house.
That's--no, that's not right.

　As expected, that's not going to pass, my house is just my house.

''So, the Demon King-sama is free to come here at any time and fight Hermes at any time.
It's a good thing.
'No no. Uh ... well ...

　I get it.
　You want people to know that I'm serious.

　Your recent battles with the Demon King have been against my will, but your reputation is on the rise. That must make your sister happy.

　That's why your sister has taken Kaori into her arms.
　I'm not going to be the only one who's been in a position to do that.

........huh.

　Sigh.

　My sister is a conspirator, she likes evil schemes.
　I'm not sure how much she loves scheming, but she's so good at the idea that she would go out of her way to propose to the king and make herself, my sister, my daughter-in-law so that I could take over the family.

　I'm sure she's still "deciding" on it.

　The sister who has made up her mind has an endless supply of ideas to push it through.

　My years of experience tell me that resistance is futile, and that I should find the bottom line before it gets worse.

'....Kaori.
What is it with you, nephew?
'You can come here, but you have to promise me one thing. Don't ever touch anyone but me. There's no fight when there's a chance of getting you involved.
Hmm, I understand. I don't need to be told, but your mother told me to keep my hands off the weaklings.
Okay.

　The moment you think this is it for now - a flash of light flickers.

　My body reacted before I could even think about it.
　I pulled out my sword and cut it off.

　It was Kaori's claws.
　The shockwave spreads as it clashes with the demon king's claw, which is even harder than the orichalcon.

　It was only a second in time, and in that one second they struck each other hundreds of times.

''Feng, I'm satisfied.
Don't start with me.
You don't ask questions.
Totally.

　Kaori is very smart, unlike her apparent childishness and tone of voice.

　What I'm trying to say, what I'm trying to get you to defend, and what the intent is.
　I understand everything, and I know it's okay to brush off the "don't do it out of the blue".

　It's tricky.

　Speaking of troublesome, so is my sister.

Hey, sis, you're not going to be able to do anything about it but... sis?
....
What is it, sister?

　My sister is staring at me blankly, her face reddening somewhat.

'Sis?　What is it, sister?
...cool.
What?
"--Ha!　Nah, it's nothing.

　She turned away, her face getting redder and redder.
　What was it all about?

　Oh well, it's more about Kaori.
　If you're going to be coming back in the future, there are a few more things you need to think about.

　For example.

"Hey, here she is, sir.
What timing!

　It was His Majesty the King - probably His Majesty dressed as the King - that I heard from outside.

　As it turned out, it was the right thing to do.

　After a while, the sound of footsteps approaching, King comes into the living room.

"Here it is, doctor, it's time to talk about the group--mph.

　The King looked at Kaori and his expression intensified.

'Demon King why are you here?'
Who are you?
King Aegina.
'Oh, come to think of it, he looks just like the boy I had decades ago.
You don't seem to be growing up after all these decades.

　For some reason, the King-formed King was flying sparks with Kaori and Bachi.
　Both King and Kaori were standoffish, with neither giving in.

'What are you doing here?'
You are my teacher's mentor, and I've come to get you to practice your sword. What are you doing here?
'My nephew is my adviser. I've come to consult with him on various matters.
Are you trying to vie with me for the teacher?
You will not give your nephew to me.

　The two of them stared at each other, and things were getting hotter and hotter.

　But, well, we can avoid the worst of it.
　Kaori is glaring at His Majesty the King, but he doesn't seem to be trying to get his hands on him.
　It seems that there's no way to avoid a tongue war, but if you can't get your hands on it, well, that's fine.

　I thought.

'Master Hermes is being robbed by the King and the King.
It's a great love triangle.
Heh.

　I heard some whispering, so I turned my head in that direction, and before I knew it, the maids had gathered at the entrance and were looking at me, their eyes shining brightly.

　Well, what?　A love triangle?
　What?　Is that going to happen?

　.... that's what happens.

　Well don't fight for me?　I guess you could say.

"Good grit, King of Men.
You've got some nerve, demon king.

　It was starting to feel like a real love triangle and I wanted to get my head around it.