I Found Tiny Dungeon That Can Only Produce Metal Slime – Chapter 68

Email from IDR

Chapter 68: Email from IDR

That’s… It’s within the margin of error.

“What are you talking about? Your physical abilities have definitely been enhanced!”

Aisha says and slams the black file shut.

I can’t believe I ate 421 of them and only got that much out of them… Now I understand why people say it’s faster to do strength training.

“Listen, Yuma. This enhancement is considered a form of magic. That means it can’t be used outside the dungeon. I’d have to say I measured the data in the dungeon to write a paper about it. It’s a wonderful thing that it’s so easy to investigate.”


It’s hard to be flattered by praise.

“Tomorrow I’m going back into the dungeon. This time, I’m aiming for the 50th level!”

Fifty layers?

Yuma’s eyes widened in surprise. Fifty levels is quite a deep level.

“Hey, it’s going to be tough if it’s just me and Yuuma.”

“And it’s your job to do something about it! I’m counting on you. Koutarou.”

With that Aisha left the room. Yuma and the president let out a sigh as if they were exhausted all at once.

“Sir, are you really going to go 50 levels up?”

Well, it’s the client’s request. We can’t just turn him down. We have to go as far as we can.

The president gets up from his chair and looks down at Yuma who is sitting down.

“Yuma. I’ll start teaching you martial arts tomorrow so that you can build up your strength.”

“What, martial arts? Boss, can you do that?”

“Ataboy! I dabbled in all kinds of martial arts when I was younger. Karate, boxing, Muay Thai, Chinese martial arts, judo, wrestling, you name it.

“That’s great.”

“You wanna get stronger and make more money?”

“Yes, of course. Yes, please!”

The next morning, the president’s martial arts training began. I changed into a jersey in the hotel room and stretched carefully.

I’m going to start you off with a Shoken Tsuki in Karate.


“Feet shoulder-width apart, fists on hips. Keep your shoulders relaxed and your sides closed.”


Yushin took a stance as he was told, and relaxed his shoulders and breathed well. The president also takes a stance in the same way, and first he shows us a shoken chudan tsuki as a model.

“One, two, three, four, five!”

He thrust his left and right fists forward each time he counted. He looks very handsome.

Try it the same way.

Yes, sir.

Yuma does the same thing as the president and rotates his hips and thrusts his fists out.

“You ain’t got your hips in yet! You need to be more aware of the weight transfer of your feet and the rotation of your hips!!!”


Yuma has never done martial arts before, but he is determined to improve his combat skills as an explorer, so he punches out with his fists.

“Listen, Yuuma! If I have to go up to the 50th level it’s going to be tough on my own. I need your help. You’d better be able to fight properly.

“Yes, I’ll do my best!”

“At first, you should only be able to form a seoken-tsuki. You need to transfer more power from your legs to your waist and from your waist to your arms!”


Black Dungeon, 30 levels–

“Whoa, whoa, whoa, whoa, whoa!”


The president and Yuma were desperately running away from the rock monster that was rolling down the slope.

A huge sphere of rock, almost as big as a steel ball. If you collide with one of those boulders, you’ll probably die.

“Ah! That’s right, Yuuma. You should try ‘metalizing’ yourself and doing a Seikenjutsu!”

You’re doing it here? That’s a bit crazy…

“If it’s metallized, it can’t take any damage, right? Let’s just give it a shot!”

“Okay, okay!”

Yuma puts all his strength into his body and his body turns to black steel. He stops and faces the rock monster.

Come on, come on!

Yuma sat down and clenched his fists into a ‘Seiken-tsuki’ stance.

The rock bounces and bounces on the ground. Staring at the rock monster that looms before him, Yuma throws an all-out Shokken-jutsu (thrust with the fist).

The sound of impact echoes through the cave. Yuma feels the impact, but then realizes that his body is flying through the air.

“Hey, hey, hey.”

Yuma was bounced off a rock and slammed into the rock wall, rolling around like a broken doll and collapsing, motionless.

“Yuma! Are you okay?

The president rushes over. He lifts Yuma’s iron body and shakes him.

“Oh? You scared the shit out of me. I thought I was gonna die!”

Yuma gets up as if nothing happened.

“Hey, are you okay? That was a hell of a crash!”

“Oh, no, it’s no problem at all. I won’t be physically damaged.”

Even the president was taken aback by his stubbornness. Aisha rushes over and carefully examines Yuma’s body to see if there are any problems.

He seemed relieved when I confirmed that he was unharmed.

We continued our search and finally reached the 32nd level. The next day, we tried again in the same way, but we could not advance any further.

At night, in a business hotel room in Yokohama.

Aisha is sitting in front of the computer with her cheekbones on the floor. An email message is open on the display.

I grinned to myself as I sipped my canned coffee as usual.

The email was sent by the International Dungeon Research Organization (IDR) to governments and researchers around the world. The contents requested information about the changes that had occurred to the ‶Orpheus tablet‶ and about a new ‘black dungeon’ that seemed to have appeared.

The email came six months ago. It was about the Black Dungeon, and Aisha was intrigued by it, but she had forgotten about it in the midst of her daily research.

But when Yuma Mitaka told me about the ‘little dungeon’ in the garden, I immediately remembered this e-mail.

“The ‘colored slime’ he said he defeated, and the ‘big slime’ he defeated at the end, they came out at the same time the Duke Duke, the Lord Monarch, and the King in the mail were defeated. “They came out at the same time as the Duke, the Monarch, the Lord, and the King in the mail.”

–The extraordinary ability of ‘metallization’… Liquid metallization to change his body, and an off-the-chart mana quotient that allows him to use magic on Earth… No doubt about it.

“He’s the seeker who defeated the Black King.”


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not work with dark mode