Since the story of the other world began - a few days.

　Me and Yotaki were slowly beginning to get used to our new environment.

　To be honest, it's a world with a lower cultural level compared to the original world.
　Even though we are living in the fine rooms prepared in the castle, there are frequent complaints about modern humans. Water and other food-related issues, hygiene and customs. The list of examples is endless.

　Nevertheless, the world was a much brighter place than the one I was in before.
　There was no fear of losing one's family and not knowing when one would be alone. With Yangtaki, even if the sun is blocked by dark clouds, it's still heaven.

　If I had been summoned to another world alone, I would have gone mad with anxiety. If I'm not good at it, I may have even thrown a tantrum just because I couldn't take a hot shower.

　It's a good idea to be able to think of a joke like that, because I was able to afford to live in another world.

　-- and in that affordance, my new day begins.

　I woke up in a room in Fusoya's Castle.
　The room is about 10 tatami mats in size, with an unusually high ceiling. The floor is covered with a plain carpet, and on top of it are the minimum amount of furniture such as a bed and a table. It's a room with very few things for its size. It is said that there used to be a lot of furniture and other things in this room, but due to the country's continuing financial difficulties, the room has been kidnapped by merchants who came from abroad. From this, we can understand the situation of this small country, Fuzzy Yards.

　Yotaki and I, who are sharing the room with others, wake up at the same time and prepare for the day's work.

　It was in the middle of that process. A light knock sounds at the door of the room, and after getting our permission, a samurai woman enters the room.

'Good morning, Kanami-sama and Hitaki-sama. I have a delivery for you two today from Diprakra-sama.

　The woman with the customary drooping red hair was clearly not Japanese, but she spoke Japanese without a hitch.

　This is another result of our brother and sister's adaptation to another world.
　While I was developing the spellcraft 《Level Up》, Yotaki had completed another spellcraft.

　I'm sure that Yotaki said he was just taking a break from watching me under the shade of a tree because he was bored, but there's no doubt that ...... is unusual.
　At that time, Yotaki's words were really light and I remember them well.

''--Ah, I see. Thanks to my brother, I'm starting to understand most of it. In other words, we can use Japanese as a 'substitute' and demand the otherworldly language from the world, right?　I have already mastered our language, you see. All you have to do is to create a Japanese-Russian dictionary in your mind and use it as your 'jutsu'. And I don't think of it as being too difficult, I just think of it as dubbing a novel or a movie.

　A few days later, the spellcraft 《Reading》 had been completed.
　It was such an easy solution to the problem that I wondered what the efforts of me and Tiara on the first day had been.

　This is a stopgap for Yotaki to rest.
　If my sister was perfect, then there might not be any reason for my existence.
　Even though I feel a bit of a complex like that, I am grateful for Yotaki's "Reading" spellcraft. Now I won't have to exchange poor language for a long time with Tiara. In this way, I can even communicate with the otherworldly maidservant.

It's a good morning. ...... delivery, could it be the clothes you've been wearing?
Yes. It's a costume made by Mr. Di Prakula for Lady Hitaki.

　With a smile, the maidservant smiles and brings me a piece of fabric in her hand.
　Incidentally, she is our personal maidservant who has been taking care of us for a long time and comes to wake us up every morning like this.

　I receive the fabric she gave me, and when I find out that it is what she had promised me before, I squeal with joy.

''--!　I knew it!　Thank you for bringing it to me!　This will help relieve the symptoms of the Yangtaki!
'Yes, no ....... I was just doing my duty as a maid of honor .......

　Holding the fabric under his arm, he grabbed the attendant's hand with both hands and thanked her for her help. Then, he quickly handed it to Yotaki and headed for the exit of the room.

''Yotaki, look!　It's that thing.　I'm out of the house, you need to change now!

　When asked to change clothes with me, Yotaki agrees with a sigh.

''...... haha. Even if you don't say so loudly, I'll change my clothes. Please wait for a moment.

　I left Yotaki, who immediately began to take off his loungewear, and I walked out of the room with the maidservant. The maidservant had offered to help Yotaki change clothes, but she had refused with a gentle shake of her head.

　I walked out of the room into the hallway and shook my body as I looked out the window of that passage.
　I'm too excited to calm down.
　I'm too happy that Yotaki's medical condition is being resolved and improved one by one. After all, until I came to this other world, I've only seen it get worse. Because of that period of time, my joy is multiplied many times over.

　Thus, while I'm waiting for Yotaki to come out of the room now and then, the attendant next to me calls out to me.

''--Kanami-sama.''
Hmm, what?
...... This morning my sister was able to move on her own legs. Thanks to Kanami-sama's miraculous gifts, she is now able to move on her own. Since then, she has really ...... become a lot better, and that .......

　Unusually for an attendant who was loyal to her duties, she would talk to me about her personal affairs. It was about the spellcraft 《Level Up》 experiment I had conducted during the past few days.

''Good!　You got better after that ....... Your sister was one of the most serious cases I've ever seen, and she couldn't speak ...... so I was actually a little worried about her.
Yes, my sister was just waiting for the end ....... But now my sister is alive. Thanks to Kanami-sama, we were able to exchange greetings this morning. ......

　A few days ago, I performed a spell on the younger sister of the handmaiden who was affected by the "demon poison".
　The process is simple. I thought I would be a long-time friend of the resident handmaiden, and after asking her a lot of questions on the first day - I found out that she had a sister who was terminally ill with the same disease as Tiara.

　I couldn't think of it as someone else's problem, so I immediately forced out her sister's whereabouts and treated her as best I could. The results of my efforts were evident today.

But we mustn't let our guard down just yet. You must not be too careful when you are in the process of healing. The most important thing to remember is that my spell is still in its experimental stage and still in its infancy.
'Kanami-sama's power is a miracle!　To this day, I've seen a number of friends die out from The Devil's Poison: ......!　I'm sure my sister will be the same way: ......!　Yes, I thought so: ......!　But by the miraculous power of Lady Kanami!　My sister is, my sister is ......!

　The maidservant began to tear up as she spoke, her cheeks flushed, and she gripped both my hands tightly. Then, even more excited than I was, she thanked me again and again.

'Thank you, Kanami-sama ....... Thank you so much ....... Someday, I will definitely repay this miracle with both my sisters .......
'Uh-huh. Thanks ......

　I couldn't speak any other words because of my maid of honor's enthusiasm.
　I really wanted to tell her a lot of cautions, since the treatment had an experimental element to it, but she was unlikely to listen.

　However, I know exactly how that feels to me.
　Or rather, on the first day of the other world, I should have had the same swordplay towards Sis-san. As I was reflecting on whether I'm always like this ...... in the eyes of other people, Yotaki comes out of the room.

'...... haha. If you take your eyes off of it for a moment, here it is.

　A dumbfounded Yotaki appears in the example costume.
　First and foremost, I stare into his eyes and check the change in Youtaki's symptoms. As usual, a thick 'demonic poison' is stagnating around Yotaki. However, the speed at which it enters the body is much slower. Of course, the same is true when it leaves.

''Amazing ....... This is the clothing that plays the 'Demonic Poison' made by Mr. Di Prakra ......!

　Even though it's impossible to completely block the movement of the world's 'source', the 'Demon Poison', it's a costume with a similar efficacy.
　Unlike my forceful spellcraft, it makes good use of the properties of the fibers unique to this other world. It would be an item worthy of the Apostle's name.

　While I'm speechless with admiration, Yotaki's dumbfounded face deepens.

''No, brother. Do you have anything else to say?''
''Hi, Mr. Yotaki: ......!　They look great together!

　Before I could answer, the maidservant next to me raised her hands in the air and praised Yotaki.
　Hearing that, Yotaki's face changed from a dumbfounded face to a smile.

''Yes, thank you. ...... Here it is. Brother, here's the first one.''

　He smiles, but he's still bitter in his response to me.
　I know what that means and speak my mind inside for now.

'What?　Oh, yeah. It's Yangtaki, so of course it looks good on you. I like the color and the design, too.

　It is white based clothing, with a strong color of purity rather than gaudiness. The design is peculiar to the other world, a shape rarely seen in the original world. From the movement of the limbs peeking out from the hem of the clothing, it can be seen that it is fully functional. In general, I have to say that Di Prakula-san's work is brilliant.

'...... haha. Thanks.

　However, Yotaki didn't like it and sighed loudly in front of me.

　It's a bit unreasonable for her to look so dissatisfied despite the fact that I repeated the words of the maidservant properly. As I thought that, the maidservant bowed her head deeply and said goodbye.

............. I'll leave you with that. I'll be doing my usual business at my usual place, so if you need anything else, please feel free to let me know.
Yes, good luck with your work. We'll be at the example location, as usual.

　Unlike my time, Yotaki made a big smile at the maidservant and sent her off. I say "good luck" to the handmaiden as she leaves, and I see her off too.

　Then we walk slowly down the corridor.
　Youtaki leads the way while the floor clicks and clicks, and I follow behind him. On the way, Yotaki absentmindedly lets out another sigh.

''Huh.''
...... What, are you mad at me?
In more ways than one.

　Yotaki replied shortly, as I began to regret that I should have complimented him more on his new clothes.

"-Why did you treat your maid's sister without telling me?

　They asked me something I wasn't expecting.
　Apparently, they were asking me about my conversation with the maid of honor through the door.

'It's ....... Now that I'd heard it, I couldn't leave it alone. Even if I didn't know if my spellcasting was safe or not, I figured it was better to do it and regret it than not. ......
'Yes, there's also the issue of safety checks. But the biggest problem this time is that if you save one person, there is no end to it. I'm sure the maid of honor will tell everyone around her that the 'gentile' brought her sister a miracle. I'm sure that many patients will come to your brother when they find out.　Can you handle it all?
I don't think we can fix everyone ....... But I also want to help those within my reach.
I'm insecure because they don't say "I'm selective about who I help" there. Huh, if it was just a tiara, I could have used the excuse that it's royalty ....... I didn't think I'd be able to fix a maid girl when I took my eyes off her for a second: ......

　The fact that Yotaki is repeating himself so far means that what I did was not as good as I imagined it would be.

　However, I don't think there's anything I can do about it.
　A few days ago, when I heard the story of those samurai sisters and the girl in front of me, my mind was blank. I don't know why, but I knew that I should definitely help her. Yes, I don't know why, but I--.

'--but that's the nice thing about my brother, though. The fact that you can't see around you when someone is in need, and the fact that you are usually out of it ....... It's very much like my brother (・・・・・・).
It's just like me (・・・・) ......?

　For my own impulse, which I couldn't give a reason for, Yotaki said it couldn't be helped because it was like me.

''Yes, it's typical of my brother. So, I'll give up now ....... ''Hmph.''

　Yangtaki smiles and stops pursuing it any further.
　I, too, at the same time, stop reflecting on it any further and give my answer.

　Apparently, it was my typical behavior that cured the maidservant's sister.
　Then from now on, when I encounter the same situation in the future, I will act the same way.
　Because that's Yotaki's older brother, 'Aikawa Uzumi' --

　With that reaffirmed, we walk down the hallway and out of the building.
　Then we walk into the tower right next to Hoosier's Castle.

　It's the tallest and widest tower on the grounds. It's a fine looking castle, a smaller castle, if you will.
　However, the interior is not complex and there are very few objects inside. There is only a high ceiling on the stone floor and walls. It is obvious that it was built for a purpose but abandoned during the construction of the tower.

　We are now using that empty tower for spell development.

　Immediately, I move to the center of the room and begin to experiment.

　It's a new spell to solve the problem of the Demon Poison. The apostles have instructed me to broaden the scope of the "Level Up" - but secretly I'm prioritizing the spell to improve Yotaki's constitution.

　However, not much has changed in the past few days.
　Although I developed a remarkable spellcasting technique on the first day, I haven't been able to do a single thing beyond that "Level Up" yet.
　In the midst of a bit of a slump, when I tried to remember the games and comics in my original world to see what approach I should take to spellcasting today--

Good morning!　Here I am again, Master!

　A third tower user walks in.

'Good morning, Tiara,'
Good morning, Tiara.

　It's Tiara Fouzeyars, one of the princesses of this Fouzeyars.
　We greet Tiara in the tower, and we return the usual greetings.

　There is no language barrier there.
　With the help of Yotaki's Reading spell, Tiara and I can speak as if we were born in the same country.

　By the way, the master is me.
　Ever since I promised to teach her spellcasting, Tiara has been calling me that innocently. I stopped her at first, but when I sealed 'Master', she tried to call me 'Savior-sama' next, so I had no choice.

　Tiara sits down next to me and interferes with her own 'demonic poison'.

''Well. Today is the day I'll be able to use this thing called 《Level Up》 too!
Then shall I watch the tiara while I adjust the Reading?

　Since then, Tiara has been working with us, saying that she wants to thank us for healing her body. Because of her position, it was easy for her to get her ego out of the way in the castle, and she had plenty of time to spare, so she's really been with us at all hours of the day.
　And they are helping me to develop my spellcasting skills. However, I'm still in the process of learning the first step of the spellcraft 《level up》. ......

　Yangtaki began to read the books that were brought into the tower. It is probably the aim to increase the knowledge and language of this world a little and improve the accuracy of the translation of the spellcasting 《reading》.

''Hmm ......?　Tiara, what are you doing?

　As I watched them, I spotted Tiara bringing something strange into the room.
　For some reason, she was holding a quill and spreading a large amount of parchment on the floor with lots of parchment.

''Today, I thought I'd write down the 《Level Up》 'Technique' on the paper and fix it for my personal use!　Honestly, Master's idea of a 'technique' is too difficult!

　Apparently, he's going to change his approach to learning the spellery 《Level Up》.

''Was ...... that difficult?　That one, I think it's easy to visualize.
'Oh, there it is again!　Master, whenever he has an opportunity, he naturally tries to show off his genius!　That kind of thing demotivates ordinary people, so don't do it!
'Yeah, yeah ......?　No, unlike Yotaki, I'm not a genius. ......
'From my point of view, they're both bad!　Just being 'gentile' is so eccentric that everything you say is already eccentric!

　Waving her hands around rudely, Tiara protested.
　She was really revitalized by the spell 《Level Up》 of a few days ago. She's changed a lot from the image she had when we first met, but once she's freed from the life she just had lying on the floor, everyone will be like this.

　In the middle of that conversation between me and Tiara, Yotaki stood up and approached me.

''Hmm, your translation of the conversation is still a little strange ....... Let's fix it. Let's catch it first ....... --spellcraft 《reading》 and...

　Then he hugged the fussing Tiara from behind and used her as a spellcasting experiment without mercy.

'Wow!　Sister Yotaki!　Don't be so abrupt!　Because it's horrifying!
...... haha. I'm not stopping. I just love seeing your sleazy tiara.

　Unlike the sighs against me, Yotaki exhaled with an ecstatic expression.

''Yeah!　Let's hide our true feelings a little more!

　Perhaps because of their close age, Youtaki and Tiara quickly became friends.
　Tiara treats Youtaki like an older sister and looks up to her, so it's like we have a new little sister.

　I interrupt the two of them flirting with each other with conversation.
　These guys keep digressing endlessly if I leave them alone.

''Tiara. More importantly, we're talking about the 'jutsu' of 《level up》, was it that bad?

　Since then, that spell technique has been able to be used by Sith-san and Legacy.
　That's why I was confidently recommending the same 'magic formula' to Tiara .......

' ...... No, no, it's not a bad idea. That is probably perfect as a spellcraft. But I think it's too perfect and too advanced for the average person to understand, in my opinion. Only the masters, the 'Gentiles' and the apostles, can understand that correctly.

　The image of 《Level Up》, as the name suggests, is packed with the culture of the original world. That in itself isn't wrong, but that image may be a major barrier for people in this world to master.

''Master, I am. I want to make this spell, Level Up, available to anyone in this world. If only a few masters can use it, the amount of 'Demon Poison' in the world won't be much different. If everyone in the world could use it, it would be amazing! It would change the world for the better!
For everyone in the world to use: ......?

　Unlike my siblings and I, who were only thinking about ourselves, Tiara was thinking about someone else who wasn't herself.
　I was dazzled by the glow of her aspirations, and Yotaki continued to stroke her head rakishly.

''Ah, she's a good girl! Tiara is really a good girl and cute! For the sake of the world or for someone else, those are words that would never come out of our mouths! Huh.
Tiara, dearest ......

　We siblings are impressed and stare at the girl who shines straight up.

'I know I'm not being stooped!　I haven't mastered a single spellcasting technique yet, and yet you say this ......!

　Tiara blushed and shook her head repeatedly, as if she had misunderstood something.
　Immediately I deny her the humility.

''No, Tiara. That's a fine idea of yours," she says. I'm going to support you. ...... The spell that I came up with in the other world's culture, Tiara will recreate it for this world. It's a nice division of labor.
'Yeah ....... I just thought it would be nice to contribute to everyone like that .......

　Blurting out, Tiara muttered. It's a word she's thought about a lot in her own way.
　Youtaki and I have strengths as 'gentiles' and Tiara has strengths as a 'local'. As long as we have the ability to think, even if we have inferior qualities, she is sure to be a great help to us.

　And just as Tiara finds herself trying to return the favor to the extent she can, a new visitor appears in the hall.

''-- Uzura Wave, Yotaki!　I've got some precious clear water for you!　Drink up!

　Mr. Sis, holding a jug of water, pushes open the door roughly enough to break it and enters.
　As it was, he came close to me, hammering the stone floor with the heel of his shoe.

'Are you okay, Vortex Wave?　Are you hurt?　If you have any problems, tell me right away. I'll take care of it.

　He begins to unceremoniously grope my body, which has been concentrating on spell development. He may be checking for any abnormalities by palpation, but the act itself is provoking my physical condition to deteriorate.

'Si, Sis-san ......!　Hey ......!
Mmm, you're blushing. Diprakra told me that it's bad to have a fever. Well, as I recall, when you measure a fever, you do it like this: ......

　I quickly try to push Sis-san away, but her unusual physical strength pushes me back the other way. On top of that, she brings our faces close together.
　I knew at once that they intended to meet each other's foreheads. But having a beautiful woman like her do that to me, the heat on my face would only increase.

　Tiara, who understands the meaning of this, interrupts me and Sis-san and forces me to pull away.

''Sith-sama, you're too close!　Please get further away from me!
What?　Why ......?

　To which Sith-san returns a look of pure wonder.

''Why, ...... rather, why does Sith-sama care so much about his master's body?''
'That's easy for you to say. Because Vortex Wave's body is very important to me.

　I'll give a quick and immediate answer to what I can answer. It's a good point for Sis-san, but when Tiara hears that, she gets a divine look on her face--

"Sith-sama is ...... well, do you like your master ......?

　She quickly cut into a very sensitive area, too.
　To that, Sis-san, as a matter of course, gave another immediate answer.

'I like you. If I didn't like you, I wouldn't keep coming back to see you like this.'
......!

　Only Tiara is surprised to see her eyes widen.
　However, everyone except Tiara knows that what she just said was not a statement of the opposite s*x to Sis-san. Yotaki, who had been watching from a little distance, shrugs his shoulders in relief and asks a few words.

''...... Sith, what part of your brother do you like?''
That's right, I can use it!　No object is better suited to be the cornerstone of the world than a vortex wave body!　Uzumami, continue to master the spellcasting arts at this rate!　It's just that that body is an important thing to give to the world, and I'm not going to let it fail!

　As I knew, it was a "useful" statement on treating things.
　I nodded back with half relief and half disappointment, "Yes, I'll do my best. To that, Sis-san stepped back like a little brat and said, "Good! I am delighted.

'And. 'It's all right, Tiara,'
...... Uh-huh.

　Yotaki smiles at Tiara.
　I understood what that meant to me, but I ...... continued to talk to the Sith in front of me.

I heard that. Looks like we have another magic trick up our sleeve. Hmmm, hmmm, hmmm!　DiPlakula's stuff, you're a ten-generation long term plan!　It's all over for Vortex Wave and Yangtaki!　Hahaha!　At this rate, we'll soon be able to use the real (...) 'magic (...)' that the Lord was talking about!　It's so close!
'No, there isn't one thing useful enough to call 'magic (...)' yet: ......?　Unlike the [Level Up], which transforms into the power it should have been, the 'price' for the others is really harsh.
'Really?　From what I heard a while ago, it didn't occur to me that it was tough: ......
'No, it's all about lightly igniting them and blowing up their memories and all that stuff ......?　It's tight. It's obviously not worth it.

　I've already finished developing the "fire-making spell," which is the most basic of the basics in games. However, to be honest, I have to say that the "Jutsu" is a failure.
　I'm going to use that joke of a 'price' as an example to deny Sis's words.

It's easier than starting a normal fire, isn't it?　You can cut out that whole annoying process by cutting out a bit of memory: ...... I think it's great!
'Mr. Sith. Memory is a very important thing for people. Anyone would use a tree to make a fire rather than lose their memory. That's why my spellcraft is still ...... unfinished.
Is that how it works?　...... Well, okay. I know that Uzura Wave doesn't cut corners, unlike the other humans. Hmph, I'm sure that soon the 《level up》 will be powered up as well ....... It will go beyond 'something magical' and become a real (...) 'magic (...)'!

　Mr. Sis says that word at every turn these days.
　It's also my primary goal.

　I've decided to call it 'magic' as a memorial when I mastered the spellcraft, cured Yotaki and saved the world.
　That's why I vow to Sith-san.

'Yes, I promise. I can't do it now, but ...... someday I will make this something I can call 'magic (...)'. I will do everything in my power to make sure--
'You deserve to give your life!　It's a man's natural duty, not to mention a promise, to work hard for the world!
'Yes, ....... Still, let me promise you now. With Mr. Sis.
'......?　Oh, maybe this conversation is part of the witchcraft?　Is that some kind of 'compensation'?
'Quite a feat, Sith. This isn't as fine as witchcraft, but it's close to ....... It's a 'contract,' if you will.

　I give the 'Jutsu Shiki' that I just thought of yesterday a cool-looking name for the purpose of fixing the image.
　I have a feeling that Yotaki is giving me a dumbfounded look in the distance, saying "Again?" but I don't care and continue.

''Contract'' ......
'Yes. I swear to the world that I will stand by what I say. I've found that the world is always looking out for us. ...... That alone should give us a little bit of 'payback' and give us a little bit of meaning and power.

　It's not a 'price' to be paid to gain power. But I was convinced, though I had no proof, that it had a different meaning than a normal oral agreement.

Okay, I'll make a 'contract' with you. I'll make a 'contract' with me. Vortex Wave.

　Sis-san seems to have that conviction as well, and she replies with an unusually serious expression.

''One day, without fail, you'll show me the real (...) 'Magic (...) ''Contract.''
"Yes. "Contract.

　They nod to each other - for a moment, I feel their gaze on each other.
　It wasn't Yotaki or Tiara in the same room. It was as if this world had witnessed and witnessed the 'contract'.

　In this way, I continue to report on the development to Sis-san who has inspected the site.