If you use the Fruit of Transparency, you can become transparent.
　But there are several ways to do this...

(1) Apply the juice directly to your body.
(2) Eat the fruit itself.
(3) Mix the juice with a "magical hot spring potion" and drink it.
(4) Mix the juice with "Magic Hot Spring Potion" and apply it to your body.

　So far, these are the four possible types.

But ...... is not very convenient to apply to the body.

　I looked at my hand, which had become transparent.
　If you look closely, you can see that some parts are not fully transparent.

"Do I have to apply it all over to make it completely transparent? ......
"All right. Brother.
I'm going to go into the other room and smear some juice on Lysette's body.
...... Huh?
Wait, wait, wait.

　I raised my hand to stop Haruka and Yukino.
　Then, so that everyone could see, I pressed my invisible palm against the table and ...... released it.

　I heard a faint sticky sound.

"When you apply the juice to your body, it gets sticky. If you put it on the soles of your feet, it will make a noise, so I don't think it's good for covert action.

　It's possible to apply it to weapons, though.
　If you can make swords and arrows invisible, you can be a great threat to your opponent.
　But what we need now is a way to make ourselves invisible and infiltrate the Castle of Fangs safely.

I wish it was easier to use.
"How about diluting it with a potion?　My king.
Yes. I'll try that. Prim, can you try to make a potion with the juice of the Permeable Fruit mixed in, in varying concentrations?
"Yes, sir.

　Prim took the Fruit of Permeation and moved to the other room.
　I took the Toucan Fruit from the branch and enhanced it with the Naming Attribute.
　I place a total of five of them on the table. You can't see them.

　I'll leave the potions to Prim and experiment with what happens when I eat the Permeation Fruit.
　First, take a knife and peel off the skin of the Permeation Fruit... oh no, it's very difficult to peel because it's transparent.
　Oh well, we'll just make it easier to eat. I guess that's it.

Lysette, would you like to try some?
Yes, sir. Brother!

　For some reason, Lisette kneeled down in front of me.

I'd like to thank you for the transparent fruit that my brother, the High King of the Deformed, peeled off for me.
You're exaggerating.
Because it's a forbidden fruit with great power.

　Then Lisette sinks her teeth into the transparent fruit.
　She took a slow bite, chewed, and swallowed...

"Lysette (Liz-sister) (Lysette-san) disappeared ────!

　Lysette's body became transparent.

"Yes, it's true. I'm gone... but...
But the ...... clothes are still there.

　It's a good idea to have a good idea of what you're looking for.
　I'm not sure what to make of it.
　But only the body becomes transparent. But only the body becomes transparent. What you wear remains.

Lysette. Can you see what's around you?　Even me, Haruka and Yukino?
Yes. Yes, I can.

　Lysette nodded. It looked like .......
　Doesn't being invisible affect your eyesight?
　I'm not sure what to make of it.
　Maybe they can see things magically even in this state.

Lysette, try to see if you can get through the wall.
"Yes, sir.

　Lysette's clothes move toward the wall.
　I can see something pushing against the wall, but...

"...... I'm sorry, brother. I don't think so.
"No, no need to apologize. But it looks like the ...... fruit of permeability can't pass through matter. Is this a problem with magic power? ...... Is the physical obstacle too great? ......

　I'm not sure what to make of this, but I'm sure it's a good idea.
　No, just being able to turn invisible is enough for now.
　It would be a disaster if the "transparency" effect wore off while you were passing through the wall.

First, let's figure out how to make the clothes transparent.


Yes!　Brother. How about soaking Liz's clothes in fruit juice?
I'm sure it'll make her invisible, but I don't recommend it at .......
Liz, can I try it?
"...... Yes. Sure.

　Lysette's clothes come close to Haruka's.
　I'm not sure if this is a good idea or not, but it's a good idea.
　The clothes became transparent. I did, but...

It's sticky. ......

　Lysette's clothes are dented in the shape of her hand.
　When she jumps lightly, a sticky sound is heard.
　It's because her clothes are soaked in juice.
　It's not good for covert action. This means that .......

If you want to be completely invisible, you have to take off your clothes.

If you eat the Fruit of Permeation, you can make your body itself invisible.
　This is because you can absorb the magical power of transparency by eating it.
　But in order to make your clothes and equipment transparent, you have to apply the juice to them.

　But if you do that, your clothes will be sticky and you will not be able to move well, and you will hear the sound of water.
　So, in order to become completely invisible and act covertly, you have to take off all of your clothes .......

　No, ...... that's not possible. No matter what.
　I don't mean defensively, I mean mentally.

　I'm sure you'll be able to find something that works for you.
　Also, I have the storage skill of the King's Vessel, so I can take out my equipment and put it on when I am in danger.
　If you become invisible, you will not be seen by others.
　So it's not a problem to act without clothes. .......
　It is too much of a mental hurdle to sneak into someone's castle naked and act covertly .......

　I think we need to find another solution.
　For example...

"Okay, okay!　Lysette, I'm ready!
"What?

　Suddenly, there was a swooshing sound.
　Lysette's clothes fell to the floor with a thud.
　The underwear that had appeared in the air shifted and fell to the floor as well.

　Lysette's figure completely disappeared.

"What do you think? Brother Shoma.
"...... Yeah. I can't see a thing.
............ I'm glad.

　It's a good thing.
　I'm not sure if this is a good idea or not, but it's a good idea.

I'm not sure if you'll be able to find the right one for you.　I'm not sure what to make of it. If Lysette awakens, she will be able to use her dragon scales for defense. I'm sure you'll be able to find something that works for you.

　In a high-pitched voice, Lisette shouted.
　I thought I could see her face turning bright red.

So, this role is only for ...... Lysette. No one else ...... can do the same .......
Lysette, just checking.
Hi, .......
Can you make clothes out of the bark of a spruce tree?
What?　Uh, yes. I think so. It's not very comfortable because it's hard, but if you join the bark together well, you can make .......
I see!　That's great, brother!
I'm sure you'll be happy to hear that. Shoma-san!

　I think it will be 'Transparent Skin Clothing' to be exact, but the effect should be the same.
　However, it will consume one slot of the Naming Breath.
　But it's the only way. I can't just sneak into someone's castle naked. .......

What happened to Prim, by the way?

　When I said that, the door of the room opened with a bang.

"Thank you for your patience!　My king!
"Hey! "Hey!

　Prim and the transparent walls lined up to enter the room.

I'm sure you'll be happy to hear that. 」」」」
I'm not sure what to make of this, but I'm sure it's a good idea.

　Prim extended her hand towards the ceiling and announced.

The potion was made by mixing the juice of the Permeation Fruit with the magical hot spring water in the Priority Enhancement Area at a ratio of seven to three, making it highly absorbent and non-sticky when applied to the body. The Soldier of Will is originally powered by the magic of the Dragon Vein. By using 70 percent of the hot spring water that condenses it, the remaining 30 percent of the magic power of the Fruit of Permeation is absorbed very well!


"'Hey, hey, hey, hey!

　Prim is palming a transparent "soldier of will".
　I do the same thing, and it's ...... true. It's not sticky at all.

　This is the effect of the "magic hot spring water" in the "priority enhancement area".
　The hot spring water in the frontier has a very high concentration of magic power. The magic power was originally extracted from the dragon veins running through the earth.

　And the "soldiers of will" are also powered by the same magic.
　So, if you use a potion made from "hot spring water" and "permeability fruit" on the "soldier of will", it will absorb it all at once - in other words, it will "swallow" it. So, because they're not applying it, but drinking it, they can absorb the power of permeation quickly, and it doesn't stick to them. That's amazing.

I did my best!　I hope I was useful. I'm a military man!
I know. Thank you. Prim.
"Heh.

　I patted her head, and she closed her eyes happily.
　Then I reached out toward the sound of Lisette's voice.


　I reached over to where Lysette's voice was coming from and ...... puffed.


"──────?
"Hmm?


　Squishy squishy.


"............ brother.
Bad. Lisette.

　I must've groped the wrong part.
　For now, I'm off Lysette.

Well, let's just call the experiment over. Lysette.
Yes, yes. I'll release the invisibility. Brother.

　Lysette said in a shaky voice.
　I looked down at my feet.
　There was a roll of underwear and clothes lying on the floor.

"...... Wait a minute, Lisette.
What?

　Lysette appeared in front of me.
　She was naked.

"Huh? Huh?　I'm sorry, sir. I'm sorry, brother.
"...... No, don't worry about it.

　I turned my back for now.
　You'll be able to find a lot more information on the web.

That ...... we're family.
That's right, isn't it? We're brother and sister.
Yeah, we're brother and sister.
............
............
All right. Brother, may I look at you?

　Lysette said, so I turned around.
　Lysette was standing there, fully clothed.
　Her upper body is transparent, and she's holding it with both hands.
　I remembered that I had poured the juice of the ...... "fruit of transparency" on it. .......

"Lysette said, 'Stop being transparent,' but it didn't come back. ......
I see. When a person becomes invisible, they can stop it at will, but in the case of clothes, it stays until the effect wears off. ......
When does the effect wear off?
I'm sure you'll be able to find something that will work for you.
I'm not sure.　So, Lysette wears these clothes all the time?
No, I think you should wash them.

　The reason the clothes are transparent is because of the power of the juice from the Transparent Fruit.
　If you wash them and the juice diminishes, the effect will disappear.

...... Yes, that's right.
"...... Oh. That's right.
"............

　I wonder what's in this air.
　Lisette is looking at me with feverish eyes. She's holding her chest, looking embarrassed.
　In this world, Lisette and I are brother and sister-in-law - just like real siblings, but...
　It was a strange feeling that I almost forgot that.

"Wow, my brother!　I'm sure you'll be happy to know that Prim's Invisibility Potion is perfect!


　Shoo.




　I heard Haruka's voice and felt something warm pressed against my back.
　I turned around to see Prim and Yukino behind me, experimenting with the Soldier of Will and potions.
　So, the one who is now invisible and hugging my back is .......

Haruka. What are you doing? ......
So... I'm not sure what you're talking about. It's amazing. By mixing it with hot spring water, it's absorbed quickly, and you only need a handful of "Transparency Fruit". It's a great invention!　The birth of the Frontier Invisible Corps!
Just put your clothes on. Haruka.
If you could do that, we wouldn't have any trouble! My Lord.
Why?
I accidentally spilled a potion on my clothes earlier. ......

　I looked around the floor of the room.
　It's true, Haruka's clothes are nowhere to be found.
　It seems that the spilled potion has soaked into her clothes and turned them transparent.

There are a lot of practical problems with ......'s transparency technology.
I think you'll be fine if you're careful. Brother.

　Next to me, Lysette laughed.

Lysette worked very hard on the experiment.　I did my best!
"Yes. Thank you. Thanks, Lisette.

　I reached out and stroked Lysette's hair properly this time.
　I'm not sure what to do, but I'm sure I'll do it.
　I'm not sure if this is a good idea or not.

What? I was going to try out various effects of invisibility. ......
I'm not sure what you mean by that.　Haruka.
When your brother was in the hot springs...
...... Let's go outside for a minute and talk.

　I'm not sure what to do, but I'm sure I'll be able to do it.
　The only ones left in the room are me, Yukino, Prim, and two "soldiers of will".

　We toasted to the success of the experiment by substituting the freezing potion for juice.
　We celebrated the success of the experiment.

The first thing we're going to do is make clothes out of the bark.
I'll leave that to the villagers. There are some people in Hazama who are very good at making clothes.
And then we'll share the responsibility for the hostage exchange. Shoma-san.

　Prim said, and Yukino nodded.

Who's going to be in charge of Princess Carol's bodyguard and who's going to sneak into the Castle of the Fangs?
"Hey! Hey, hey, hey, hey!
I know. Princess Carol's bodyguard will also be in charge of the Soldiers of Will.
"Hey-ho!
Yeah, right. I think it's better to be invisible to keep Princess Carol on her toes. And since you guys have experience carrying Princess Carol as a cabin, you can match their pace.
"Hey! Hey, hey, hey, hey!
"Hey, hey, hey!" "Hey, hey!" "Hey, hey!" "Hey, hey!
"...... Excuse me, my king, Yukino-sama. It seems I'm still not very good at fence-speak.

　Don't worry, Prim. Yukino and I are only vaguely communicating with each other.

It's up to me and Lysette to sneak into the Castle of the Fangs. I'm the only one who can activate the magic circle anyway. I'll make Lysette invisible and have her assist me.
"Okay. I'll use the plans of the Castle of the Fangs to determine the best route to sneak in.
What am I supposed to do?　Shoma-san.
Yukino, go to Princess Sylvia's. I want you to get to know Princess Carol and get information about the Castle of the Fangs and the Grand Protectorate of Gurtra. That way, it will be easier for me to escort you and conquer the castle.
Can I take the invisibility potion with me?
...... Think before you use it.
Yes, sir.

　And so ends the experiment with the Fruit of Invisibility...
　And so the experiment with the fruit of invisibility was over, and we began the full-scale preparations for Princess Carol's "hostage exchange operation".