That's why.

　When I left the party venue, I found myself in the school where the nobles attended.
　I deployed a ward in an appropriate empty classroom, where I explained the situation I saw to Ituna and Sianne.
　Ituna is sitting on a chair in a well-behaved manner while Sianne is leaning against the classroom window.
　In the darkness of night, the only light that shines on us is the light of the moon.

'Well, what does that mean?'
'I don't know what a villainous daughter is in the first place, but...'

　Neither of us can keep up with the conversation at all.
　Well, it's only natural that I lack the knowledge to make the premise for myself.

This is an alternate universe based on a romance game. The heroine has been transported to another world and is trying to marry a male character she's targeting. And the villainous daughter, as the name implies, is the villain's daughter. She is an obstacle between the heroine and her captive. It's usually the fiancée of the capture target.
"...no, there's so much jargon I can't understand it.

　Oh, I had to explain to Cianne from the definition of love games and game-imitating other worlds in the first place.

'It's okay, Cianne. I don't really understand what I'm saying either.
Well, as long as you don't need to know, it doesn't matter.

　What kind of credit is that?
　Hmm. Maybe I should break it down a bit more.

"There's a game where you use every trick in the book to create a fait accompli with the guy you want to capture, and you win if you marry him. You're in an alternate universe based on that.
'What, in essence, women fighting each other to win the man. Well, just say so.

　I feel like I've been perverted by brainiac Sianne, but it's too much trouble to correct her, so I'll leave it at that.

　Well, the problem is with Itsuna, who's staring blankly in this direction.
　Considering the current situation, it's our last hope.

Hey, Itsuna. Hey, Itsuna, have you ever played a love game?
No!

　Oh, it's done.

Why?

　Even though I responded cheerfully, I gave a thud, and Ituna seemed a little flustered and worried.

I'd like to have you teach me a lot of things about the game if you have experience with romance games. To tell the truth, the wives I entrusted with this kind of other world are not married because they graduated a long time ago...
'A graduate wedding?　Not divorce?
'Yeah, because those guys didn't break the harem rule. As for my wife who decided to be independent of me and fend for herself, I'm actively letting her graduate from me.

　In short, a wife who has decided to stay in one world without falling out.
　That's what a graduated marriage wife is.
　I used the term graduated marriage, a form of self-promotional engagement I've heard of on earth, because separation is also a bit different in nuance.

　Divorce and graduated marriage are similar but very different.
　In the case of divorce, the cheat ability is forfeited and released.
　In the case of a graduated marriage, the cheat ability is left unchanged and you're free to go.
　I don't even need to think about which one I can afford.

''Hmm. I have a summoning agreement with my graduated marriage wife, so I can summon her if I want to.......''
"Summon...?　You can't do that!

　For some reason, Cianne bites into my casual comment.

In that case, let's have you sign that contract with me as well, right now!
'Oh....'

　I wondered what it was, but he was worried about being left behind before.
　Well, the worst case scenario was that thing and it was goodbye forever, so no wonder?

'Ummm ... in that case, I'll have you sign a 'summons and pledge' as well, is that alright?'
Well, that's...

　Yes, a cheat that a graduated marriage wife is allowed to have voluntarily is an abominable 'summon and pledge cheat'.
　Looking at me so far, I'm sure Cianne can understand what it means.
　She asks back with a mysterious look on her face.

''Does that mean I'll be wandering the other world just like you?''
'No, you can set the range of pledges when you give a cheat, so the pledges should be limited to me. Also, the timing of the summons is when I agree to the pledge, not when I pledge. The summons is not compulsory, it's a request. You're also free to accept a summons from me or not.

　However, I hold up a finger while reminding him that.

The only thing you can do with this cheat ability is to give it to them once, even I can't take it off again. I'm not going to be the only one who has been in a position to do that. And if you respond to my summoning request, of course you can't return to the other world you're in at the time, and once you refuse, you can't fulfill your pledge.......I'll never be able to summon you again.
'In other words, as long as you continue to agree to it, I can be summoned to you as many times as I want, even if I'm in another world.
Yes.

　As expected of a cheat maniac, Cianne, you are quick to understand.

　I'll comply with the summons you can continue to transfer under me as many times as you want as long as you continue to fulfill this pledge.
　Not fulfilling the pledge, means you will continue to stay in the world you are in. The basics in this area remain exactly the same.
　Thus, the "Summons and Pledges" that I give my graduate wife to have are much softer. If you compare them, you can see how my pledge setting is filled with the maliciousness of a f*cking god.

I'm not going to be able to get it right. That thing can essentially travel between different worlds as long as the points you set it up can travel between them....

　Rather, that's how it's supposed to be used.
　The cheat ability of the otherworldly trippers, who span multiple worlds, is dimensional transfer.
　I'm the exception, as I can only use it as a teleportation tool.

You can't use it for one-shot breakaway tactics because it can't be used continuously and has a cool time. It can easily be sealed with a means to seal off dimensional travel. Other than the previously described weaknesses, did you have such a feature?

　Sianne just told me why I use shrinkage and light-winged sprint instead of dimensional transfer for normal high-speed travel.
　I made Sianne aware of my weaknesses and fed her my dimensional transfer chicken.

''That's right. But of course, it will be restricted by the 'Summons and Pledges', so you won't be able to travel between different worlds like I did. So what do we do now?
'I'll take it. If you don't know where your summoned world is and can't join it, then even the dimensional shifting ability you just learned about won't do you any good.

　Well, I knew Cianne would answer that.

'And it helps that I'm good at covert action, making it easier for us to work separately, and the only time I'll leave you is when you die. It won't bother me at all.
Oh, I want one too!

　Ituna peeked out from beside Sianne.

''Ituna too?　Are you sure?
Am I a graduate?　And I probably won't do that. And I want to be with Sakahagi-san all the time!

　Ituna also says things that make me cry with Itsuna.
　It's true that as long as she's my wife, she's got an immunity to other world summoning magic as well as charm and brainwashing, so I can't summon Ituna with my hero summoning magic anyway. You have to be in the same world as them to be able to make a release decision, so summoning them without their resistance is not an option.
　I'm sure you'll be able to find a way to make it work for you.

''Well, let's have the two of you eat the hamburger with the 'Summons and Pledge' granted to you.
Mmm, isn't it a chicken?
Chicken...

　The highlight disappeared from Ituna's eyes as Sianne complained in frustration.

'Chicken no!

　He quickly cast a hypnotic spell on Ituna, who began to cry and scream, to silence her.
　She tapped Cyanne's surprised face on her shoulder and shook her head.

''Sianne, I don't know why, but Itsuna doesn't like chicken. It's so delicious........
Okay, okay. You can't taste that, poor thing...

　We both feel sorry for them, but I let Ituna lose her memory of the last thirty seconds or so, and then break the hypnosis.

'Huh?　Oh, I want that because I want to stay in a room with Sakahagi-san all the time!

　Seeing Ituna's energetic and healthy form, me and Cyanne couldn't help but grunt and hold the corners of our eyes.



''Well, back to the subject at hand,''

　As they finished their burgers, he resumed explaining again.

'That's why. I could summon my graduate wife, though. We're all living free, and it's not a good idea to have her help us, is it?　And if we can't go back, that means we have to leave our lives behind.

　And if the reason for summoning is "I don't understand the other world of the villainous daughter, so help me out," then the ones that will come won't come either.
　More than anything else, summoning my wife for a stupid reason means I fall into the same level as those summonsers who call me scum. It's really not acceptable.
　Summoning graduated wives who can kill even the highest ranking gods with a laugh is just a trump card.

''Hmm, tough.''
I wish I had someone to marry who knew what they were doing.

　Both Sianne and Ituna are giving it serious thought.

''You're the one who understands the villainous daughter... oh...''

　.... yes. I know my true name, so there's one suitable person among the people I can summon for appointment.
　I've never been a wife to begin with, so I don't know if she'll come or not.
　But because she's not a wife, she's an exceptional person who, unlike Ituna, meets the requirements to be summoned.......

''Wouldn't it be better to go and ask the person you think is the pledge first for a wish?
I might as well get on with it.

　What Sianne and the others say is also true.
　I can't believe that what I did with me was to miss even such basics.
　It's no good, I'm still subtly unmotivated.

''And if the villainous young lady is a reincarnation, she might know something about it.
Ah!

　The moment I heard Sianne's suggestion, buried memories came back to me.

'Yes, I remember!　For some reason, the villainesses are all reincarnated, and they all regain their memories at different times, but they always had experience playing the original story in another world. That's why I 'know as a game player' the doomed future that's coming to the villainesses!
'Well. Does that mean you know what's going to happen next?

　I'm lost in thought while putting my hand on my cheek to see if Ytsuna understands in a way that she doesn't.
　Then Cyanne nodded with a look of understanding and not understanding.

'Okay, I have an idea.
Really?　You did it!

　Ituna cheerfully responds to Cianne, who is confidently stretching her big chest, by jumping up and down with a pion.

　It's something that's going on on its own, but under the circumstances, even Sianne is reliable.
　It's a good idea to leave it to him, since he's already motivated.
　But........well, I think there's one more thing I need to remind myself of, but.......
　d*mn, I should have learned the pattern of the villainous daughter in my head if I was going to do this.

''Oh well, I'll leave it to you. For now, I'm going to set up a base in this academy as well, so we're going to split up.

　I'll think about the rest while making my initial move when I come to the school, but I undo the wards.

''Then I'll be off. I'll be back here in a few hours. Ituna, come with me.
Okay!

　As they both disappeared with Sianne's invisibility ability, the classroom door opened and quickly closed.

　Yeah, yeah, we're both getting along really well.
　Is it okay if I let them meet the bureau soon?

Well, I guess I'll just have to do the same.

　I jumped off the top of the teaching table and slowly left the classroom.