The rain that started yesterday afternoon is still falling today.

　Inevitably, today's work is cancelled, and each of us will be training in our own rooms.
　I, Yuki, and Haruka are training in magic and alchemy, as usual. Natsuki is embroidering a magic circle.

　Toya, the only one with nothing to do, had been lounging around in bed for a while, but just now he ran outside shouting, "Rainy day training! and ran out of the house. We didn't say anything, but he couldn't stand the fact that he was the only one not doing anything.

　Normally I would be worried about a cold, but I'm sure [Robust Lv.4] will do the job.

I'm hoping to successfully activate Light Weight and Extended Space today.
"I've been able to activate them more consistently, so I think I can handle it.
I hope so.

　Fortunately, the addition to the magic bag itself can be practiced as many times as you want by releasing the magic power contained in the magic circle.

　If you just write on it with ink, it seems to deteriorate as you repeatedly add and release it, but perhaps it's because of the embroidery, but so far I haven't seen any signs of deterioration.

　Still, I have been practicing with an ordinary jute bag instead of a backpack. And it is Natsuki who is supporting me.

　While Haruka is doing additional work as an alchemist and Yuki and I are using space-time magic, Natsuki is doing the work.

I think we're about halfway there.

　The addition of magic is completed by using the magic, maintaining it just before it is activated, and then pouring the magic into it.
　The bottleneck is the maintenance part of the spell. If you've got a lot of time, you'll be able to make a lot of money.
　It's a bit pathetic, because Halka seems to be taking it pretty well.

I'll try a smaller one.　If we make the magic circle smaller, we can reduce the time it takes to pour.
Hmm, that doesn't sound quite right, does it ......?

　It's not just about the size of the bag, it's about the amount of magic you can put into it.

　In other words, if you prepare a small bag and a small magic circle, you only need to maintain the magic for a short time to complete the granting.

　However, I have a feeling that the reason for my failure is not due to a simple maintenance problem. It's almost like a hunch.

　However, I don't really know what it is. It's just a hunch.

"Hey, Nao, did you read this part?
"Hmm?　It's a grimoire of space-time magic, bottom volume?　I've only skimmed it.

　Yuki held out the grimoire of space-time magic, bottom volume.
　I don't even fully understand the upper volume yet.
　I've only looked at the lower volume to see what kind of magic is in it.

"Then read here.
"What's that?" ...... "Column: Is Space-Time Magic Profitable? . Hey, what's this about?
I'll just read it.
Oh, my God, .......

　I protested to Yuki about the title, which was a bit lighter than I expected, but she strongly told me to read it, so I decided to read it.

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I'm not sure what to make of this.

　Hey there, readers. I've been working on this for a while now.
　I'm sure you've heard of it.
　I know how you feel. Space-time magic is more difficult to learn and use than other types of magic.

　Fire magic is easy to figure out, boom, boom, boom. In addition, you can sell ice in the summer and earn money easily, so you'll be safe forever.

　Earth magic is also a bit simple, but not insignificant. You don't have to do anything dangerous, you can still work when you're old enough to help with civil engineering, so it's not so bad.

　Not to mention light magic. It's been sought after since level one. Once you reach level 5 or 6, you'll be respected by everyone, and you'll be able to play and live if you want to.

　On the other hand, wind magic is a little more approachable. It's not so great until you get to a higher level. No, it's just a useful magic.

　Dark magic?　That's a bit different. It's not something to be discussed as useful or not useful.

　In that sense, spacetime magic is a little hard to use.
　Up to level 3, the effects are quite subtle.

　That's why I was expecting a level 4 Sanctuary.　I wonder who gave it that name. It looks great, but the effect is kind of dull. .......

　In fact, this is the spell I've used the most. It comes in handy when you're camping. It keeps all the bugs out. Of course, that's not how it's supposed to be used, and it's great when used by high level people. In the case of my master, he was able to bounce back arrows and magic.

　I was so happy when I was able to use "teleportation" at level 6. ...... Immediately after that, I was devastated to find out that I could only fly within my field of vision even if I used it to the fullest.

　Of course, this is also great when used by high level people.

　But only a handful of people can reach that level. But only a few can reach that level, because it's usually difficult to even use level 6 magic.
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I don't know. I'm not sure if this is a complaint or not.
Well, read it to the end.


"Really?　Seems like a waste of time to me. ......

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　That's why most people fail in the middle, space-time magic.

　I'm sure you've heard of it. But if the magic you're able to use is just a bunch of crap, you won't be able to maintain your motivation, and you won't be able to make a living in real life.
　Ordinary people can't spend all their time practicing magic.

　I think the magic bag is the first thing that comes to mind.

　It's so well known that people think of magic bags as space-time magic and space-time magic as magic bags.

　Yes, it's true that if you can make a magic bag, you can be assured of a secure future as a space-time wizard and a life of left-handedness. I've made a lot of money, too.

　That's how I've been able to find the time to write this book.

　Anyway.

　Magic bags are not really that easy to make.

　In fact, magic up to level 3 is enough, so even a time-space wizard who failed halfway through the book can make one, don't you think?　No, no, no. If it were that easy, they'd be selling more of them. That's what I mean.

　First the alchemist. You need a partner to work with.

　This other alchemist doesn't have to be very skilled, but they do have to have aptitude, so it can't be just anyone.

　Besides, the alchemist and the space-time wizard need to be in sync, so if they are incompatible, it won't go well at all. In other words, if you can do it well, you can do it well. Actually, my wife is an alchemist. Ha-ha-ha.

　Oh, I'm getting off topic again.
　I'm talking about magic bags.

　To tell the truth, it's not that difficult to make a magic bag if there's only one spell to be cast on it: Light Weight, Slow Time, or Extended Space.

　I think even a beginner time and space wizard would be able to pull it off.

　And if you're actually going to use it, I think it makes sense to have a magic bag that only has one function, but it won't sell.

　Or rather, they don't treat it as a magic bag because they think a magic bag is one that has "light weight," "slow time," and "extended space.

　I guess it's a stereotype.　I think there should be a market for single function magic bags, but if merchants won't buy them, there's nothing the producers can do. I had a lot of trouble finding the money in the beginning.

　Now, if the single function magic bag doesn't sell, then the only thing to do is to make a magic bag with three magic functions, which is commonly known as a magic bag, right?

　But this is difficult.

　First of all, you have to activate all three spells at the same time. It's like writing with your hands and drawing with your feet.

　I don't have many tips for this. You just have to practice to be able to use magic almost unconsciously.　It's quite manageable with practice.

　The next part is the hard part. You have to pour the magic into the spell circle, but if you just pour it in, it's almost guaranteed to fail. I've had this problem too.

　I tried pouring them in at the same time so that they were evenly distributed, pouring them in order, changing the order, etc. ...... Anyway, I tried a lot of different things. Anyway, it was hard work.

　If it hadn't been for the encouragement of my partner, I probably would have failed. Those days of trial and error were not in vain, though, because they nurtured our love.

　Well, in the end, all I needed to do was to mix each magic into one, and then pour it into the magic circle.

　Huh?　You don't know what I mean?

　Well, I guess you could compare each magic to colored water, mix them together in your mind to make a new color, and then pour it into the magic circle.

　At least that's what I've been able to do.

　If you can do it too, you can make a lot of money and live an elegant life.

　Of course, you'll need a compatible partner, though, right?
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What the hell is this?　Mostly whining and giggling!　All you need is the last few lines!　And by the way, you should have written that advice in the top volume!

　I read the whole thing as Yuki asked me to, but most of it didn't make much sense.
　The advice in the last part was somewhat useful, but that could have been written in the upper volume, where the magic bag is described, with a few additional lines.

"Harassment?　Harassment?
I know exactly how you feel. You wanted to stop reading halfway through, didn't you?　It's unnecessarily long, and it's a 'column' that seems to have nothing to do with the text.

　Yuki nodded deeply in agreement with my indignation.

And then at the end, you give a quick piece of advice that seems important.
"Yes, I think so. I think so, too." "It's written all the way in the bottom of the book!

　If it had been in the upper volume, near the description of the magic bag, I might have read it. But in fact, it is in the lower volume.

　The lower volume contains magic of level 8 and above, as well as more advanced concepts. If you are a wizard who has not yet reached that level, you may not have even bought the book.

I don't understand, is there anything good in it?

　I'm not sure, but did it say anything good?

The whole thing is a waste of time. However, some of the advice might be useful.
We'll just have to try it out. Haruka, can you help me?
Yes.

　I'll use Light Weight and Extended Space.


　Imagine a color for each: ...... red and blue.
　Mix them together, turn them purple, and pour them in -- oh, that's smooth.
　It's a lot easier than pouring two spells together.
　Isn't this going to work ......?

"Okay, done--?

　It seems to have worked without interruption, but is it a success?　I'm worried because I've had so many failures in the past. .......

I don't think I had a problem either, but let's try .......
Yeah, right.

　This time, I made a bag about the size of a plastic bag from a convenience store.
　I'm not sure if it's a good idea, but it's a good idea.

"Oh, oh, oh, oh!　It's in!

　It felt very strange to see it again. The spear was two meters long, and it went into the small bag smoothly.
　The bag was light even when I lifted it up. At least, it's not heavy enough to hold a spear.

"You did it, Nao!　This is going to be so much easier!
"Of course!　Right! Right!　Let's start mass-producing them right away!

　"Let's mass produce it right away! We've been through so much together.
　Space-time magic is really difficult.

Wait! I'm sure you'll be happy to know that I'm not the only one who has a problem with this.　Also, can't you add 'slow time'?

　Haruka threw cold water on me, and I pondered.

As for the size, I don't think it's a problem. I don't think the size is a problem, it's that stable. How about three ...... with one more?

　I can do it with all three, but can I mix them?　And--

Now that I've imagined blue and red, what should the third color be?　And what color would that be?
"If you think about the three primary colors of color, it's yellow. If you mix them, you get black ......, which means you can't mix more than four?
You can't mix more than four?　You can't mix more than four." "With the way you're thinking about it, I don't see the need for a fourth, since it's basically only used for magic bags.

　At least for the spells in the grimoires of space-time magic, there are no spells that would benefit from the addition of a fourth.

　If you're looking for a way to do this, you might be able to replace Slow Time with Suspend Time, but this is a level 9 spell. Considering the difficulty and practicality, it would be useless.

Now it's about whether you can add all three. Let's try it.
"Right.

　I'm not sure if I'm going to be able to do that, but I'm sure I'll be able to do it.


　As it turns out, I succeeded in creating a magic bag with Light Weight, Slow Time, and Extended Space.

　However, it is no good if it is the size of a backpack. The maximum size is a plastic bag. So I had to remove the backpack, and put a plastic bag inside it.

　But there is no practical problem at all, right?

　If you put all your energy into a bag of this size, the effect would be "Extended Space", which would increase the space by 100 times or more. The effect of "Light Weight" is also less than 1/100 of the weight.

　All values are estimates.

　These are estimated values based on the fact that we tried to fill the room with whatever we could fit through the mouths of the bags in the room, but they did not fill up.

　That is to say, I can now carry the meat of the orc that used to be carried by all of us by just one person.

　This means that I can carry all the tents, cooking utensils, and even the dried dindol and dried meat left in the room of this inn.

　Incidentally, the only disadvantage of this bag is that you cannot put anything larger than the mouth of the bag.

　If it were possible to distort the space outside the bag, this would be possible, but it is probably impossible or quite difficult. If it were possible, there would be a description of such a magic bag.

　The problem with this is that you can't carry a barrel.

　Dried meat is stored in barrels that were used for pickling, but these barrels do not fit. If it's just meat, you can just repackage it in a bag, but you can't take a barrel bath in the open air.

　In the meantime, I'll set a long-term goal of "becoming able to add a bag that can hold a barrel".