I put on the work clothes I had tied around my waist and donned my goggles.
What I envision is the failed [Dragon Slaying Fist].
Instead of discarding it as a mere failure, make it one of the options.
Without a doubt, that was the best work of my life so far.
The boy praised it too, and there was no malfunction in its function.
Then, instead of creating something new, improve the [Dragon Slaying Fist].
I take out the memo I had stored in my work clothes.
What he wanted was an increase in magical power durability.
If there’s nothing with higher magical power durability than the metal I’m using now, the only option is to increase the amount of magic stones.
“Phew…”
Processing magic stones requires considerable technical skill and nerve-wracking concentration.
Because if you fail in handling magic stones, the magical power contained in them will flow into your body, destroying your [Magic Circuit] and turning your body into a corpse.
That’s why only mechanical engineers from Enkharton can create magical tools using magic stones.
Our predecessors sacrificed themselves to survive and passed down the methods of processing magic stones to future generations.
Even two lines were tough, but now I’m about to challenge processing an even greater amount of magic stones.
Three lines? …No, the boy I’m dedicating my masterpiece to isn’t someone who would be satisfied with just that.
…Four lines. Double it to four.
“Wait for me, boy…”
I’ll finish this in less time than it took for the [Dragon Slaying Fist].
“I’ll create the best right arm and definitely deliver it to you…!”
I placed the chisel on the magic stone I had taken out and swung down the hammer.
Strike. Strike! STRIKE!! Strike with all my soul!!
I’m pouring my life into this magical tool…!
An immersion I’ve never felt before.
My body moves on its own as if I can see the path to completion.
One by one, the completed magic stones pile up.
The main body that can’t allow even a hair’s breadth of error to fully unleash his power.
A concentration that drives my body to the point where I can’t even hear the metallic sounds during work.
“…Pwah…!”
It seems I had unknowingly been holding my breath, and I take a big gulp of air.
My lungs hurt. My arms are heavy. My body is tired.

The pain in my joints comes as if to make me pay for pushing myself too hard.
But right now, all of it feels good.
…That’s right. How long has it been since I put this much passion into swinging my arms for someone?
That’s why I can say with certainty.
This thing before me is my greatest masterpiece, something I think I’ll never be able to create again in my life.
“It’s heavy… but I’m glad I’ve been training regularly. I should be able to run.”
There’s no time to rest.
I have the important task of delivering this to the boy.
I shoulder the bag containing the prosthetic arm and head out of the workshop.
“The sound is coming from… over there!”
The sound of metal clashing violently against metal multiple times, and buildings collapsing.
I know I’m heading into a dangerous area, but if I were to stop here, I wouldn’t have made the boy’s prosthetic arm in the first place.
The boy is fighting too! So I’ll fight as well!
The sound grows louder and the view opens up as I get closer. There’s no trace left of the famous tourist spot; it has turned into a battlefield.
“…Gah! …Ugh!”
“…!”
This voice… it’s the boy’s fiancée! Overjoyed at reaching the boy, I run towards the source of the voice.
And the first thing that comes into view is the fiancée with a pale face using magic and—
“Ouga…! Wait for me! I’ll stop the bleeding with [Healing Magic] right away…!”
—the sight of the boy who has lost his right arm.
“…! Boy!”
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“…Mm! …da…nen!”
…I can hear someone’s voice.
…Damn it. No good. My vision is blurred, I can’t see clearly…
That’s not all.
Somehow… my head isn’t working right… it’s painful, I can’t breathe properly…
“…Ga…! Right away… [Heal]…!”
Oh… as I’m enveloped in a green light, I gradually start to become aware.
“Boy…! Wake up, boy!”
“It’s alright, Ouga. The [Recovery Heal] is starting to take effect.”
“Karen…? And even Yueri… Why are you here…!?”
As my blurred consciousness recovers, pain that I hadn’t felt before courses through my entire body.
But thanks to Karen’s [Recovery Heal], it subsides in an instant.
“Ugh… That damn magic dragon… I’ll make it pay…”
As soon as the [Recovery Heal] is done, I want nothing more than to return to the battlefield and punch that detestable face.
I try to check the extent of my injuries, looking at my right arm where the pain was strongest.
But there’s nothing below the elbow.
“Boy…”
“Ouga, please listen calmly. You protected us and took the magic dragon’s attack, so…”
“…It’s fine, I remember. I took the dragon’s tail counterattack, and my right arm that it had grabbed couldn’t withstand it and was torn off. Right?”
Karen bites her lip and nods in response to my question.
Yueri shakes her head in disbelief.
“That’s right. That’s why I came to cast [Recovery Heal] on you.”
“…Then why is Yueri here?”
“…I came to deliver this.”
Saying that, Yueri takes out the [Dragon Slaying Fist] from the bag on her back… No, it’s an improved version.
The number of magic stone lines embedded in the metal body has increased to two on each side.
And while the shape was previously as close to a human arm as possible, this time the armor is thicker, about 1.5 times the width of a conventional arm.
“[True Dragon Slaying Fist]. That’s the name of this prosthetic arm.”
“…Did you make the arm thicker to knock down the magic dragon?”
“Since the magic dragon is still alive after taking hits from Dad’s magical tool and your punch, it means we need more power. So I increased the horsepower. Also, I didn’t have time to include all the gimmicks you requested this time. Sorry…”
“Don’t worry about it. We’ll save that for next time.”
I’m rather impressed she managed to complete it to this extent.
I didn’t have enough power to defeat that thing.
The [Limit transcendence Gear – Change – Strong] was effective against it. If I could have used [Limit transcendence Gear – Change – Strong] for attacks too, I might have been able to deal some damage.
“So you risked danger to deliver this…”
“How could I do nothing when you’re fighting so bravely?”
“…Kukukuku. It seems I was lucky after all. Now I can see a way to defeat the magic dragon.”
I slowly stood up, trying to maintain my balance.
While we’re talking, Alice and the others are buying us time.
I wasn’t blown as far away as I thought.
I can return immediately from this distance.
“Thank you, Yueri. You’ve done your part admirably. Now it’s my turn to respond.”
“Boy…”
Yueri hesitates for a moment, then grips my left hand.
“Boy, I’m sorry to ask this right after you’ve woken up. But I have a request.”
“…What is it? Tell me.”
“I want you to fight wearing this.”
“Wait a minute! That’s…!”
“Karen.”
I call her name and gently pat her head.
I understand why she’s trying to stop me.
She’s seen Yueri’s prosthetic arm fail once before.
If I return to the battlefield in an incomplete state again, I’ll surely be killed this time.
But I’ll be killed even if I do nothing.
There’s only one choice prepared for me from the start.
“That thing conveniently cut off my right arm. It’s perfect for me.”
“Ouga…”
“Besides… This is your masterpiece this time, right?”
“–Yeah, I want you to trust me.”
Her eyes burn with the same passion as when she talked about her dreams.
…I see. You’ve been fighting alongside us too, haven’t you?
“Alright. I’m counting on you.”
“Yeah, leave it to me…!”
Yueri nods vigorously and begins preparing to connect the prosthetic arm to my right arm.
“Once I attach the prosthetic to match the wound, channel your magic power into it just like during the experiment. Then your body will recognize it as a part of you.”
Saying this, Yueri shows me five pointed rods attached to the connection part.
By inserting these into the arm, it will be easier to channel magic power.
“After channeling magic power, using [Recovery Heal] will make it stick, right?”
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