Telldungeon, first basement level.
　For the first time in a long time, I entered the dungeon using the mansion's transfer room to do my normal work - hunting drop redemption.

　Leia's already attached to me, and she's got a gun on her arm.
　That arm is moving with a shuffle.

'Are you subtly fired up?'
No, sir.

　It's a polite way of saying something from his usual light-hearted tone, but he's still subtly spirited.
　Oh well, it's good to be spirited.

　Now, let's get on with defeating the monsters.

''Uhhhh!''
No, I'm not going to do it!

　It was strangely noisy at a distance, and all the adventurers fled this way at once.
　Not just one or two, but so many that every adventurer on the floor escaped.

''What's the matter?''

　I asked one of them, who was on the first floor of the tellurium, so I knew quite a few familiar faces.

'Oh, Lyota-san,'
What's going on?
It's a great thing.
Haggler?
Yesterday, an adventurer got beaten up by a monster and started running away. He dropped his equipment in the dungeon.
...... Yeah.

　I understand the situation.
　There's another reason why adventurers in this world don't push themselves too hard.
　The adventurer's equipment was also dropped from the monsters when you get right down to it.
　If it was left where no one was present, it would naturally hatch into a haggle of things.

　For example, if a strong adventurer dies from a deep wound where no one can help him, his equipment will turn into a horde of hagglers and cause a second disaster.

　Because of this, adventurers in this world do not do anything recklessly.

　Even so, they are human, so they make mistakes from time to time, and this time it's an incident that was spawned by the fact that they were injured to the point that they didn't even notice they had dropped an object and lost the race.

　Even while doing this, adventurers are running away, they must be very strong monsters.

　Well, it's useless if left unattended, so if I can beat it, I'll beat it.

　I reversed the flow of adventurers running away.
　After a while, I saw an unfamiliar monster in the familiar dungeon.

　It was an unusual, almost human-shaped monster.
　But that doesn't mean it was completely human.

　It was human in size, and almost the same size as a girl around her age.
　It only had one piece on its back, with butterfly wings on the right side only.
　Her hair was also tied in a single knot - a side tail - on the right side, the same as the wings, the same as the human girl's.

'Can we have a dialogue?'
----

　The monster screamed in a voice that couldn't be expressed in words and rushed forward to attack.

　Fast!　Quickly, I kicked the ground and jumped right next to him.
　He moved after me, but followed almost as fast as I did.

　He waves at me randomly, arms up and guard - blown away.

　The whole guard was blown away.
　My arms chattered and my whole body throbbed with the impact of being blown through.

　You can't use your gun if you're reduced to flesh and blood, so I tried to get a distance, but the speed of the other side was too fast for me to keep my distance.

　Leia also shuffles her arm, but she can't even aim properly, let alone shoot.

　If you can't use a gun, it's a meat fight.
　Strength SS, speed SS, strength SS.
　I switched and intercepted them with a status that would surely not be lagging behind in a melee.

　I dodged the monster's wrinkled arm and slammed it with a gouging hook, which was guarded, so I grabbed the guarded arm and swung it around, knocking it to the ground - but.
　The counterattack came immediately, using the captured arm as an axis, a spinning kick came flying in.

　I ducked with a single piece of skin, my hair was grazed by it.

　It's fast and strong.
　If I'm all SS, then he's all S. He's so strong.
　If you're serious and serious, you won't lose, but it will take time.

"Then-- then!

　Almost as soon as he attacked, he pulled out his gun and stuck it at himself.
　If it wasn't an attack, I could shoot as it was, even if it was fleshed out - and I shot.

　I shot at myself, an accelerated bullet, a special bullet that accelerates messily and enters a different time stream.
　The moment I shot it, everything but myself went into slow motion.

　Even a monster with a speed of about S is about the speed of a waddling child in an accelerated world.

　In this state, I can't use bullets, so I'll take them down in a meatball fight.
　I approached and punched the monster with a punching motion reminiscent of the Hyakurei Fist.

　With over 100 punches in a second's time, the monster is blown up and slammed into the wall.
　Then, in an accelerating world, it slowly disappears.

''Feng ...... was strong.''

　After the acceleration melted and the monster disappeared, I mumbled as I wiped the sweat from my forehead with the back of my hand.
　I didn't even know the monster's name, but in terms of strength, it might be Dungeon Master level.

　There are slimes and such around, though, so it doesn't seem to have any special abilities like a dungeon master.

　At any rate, that's an end to it--

'Wow!'
I need help!

　This time, an adventurer escaped from the basement floor.
　No way!　So I went downstairs to the basement.
　Then I saw a monster there.

　A monster that looks like a rare human-shaped, beautiful girl.

　The wings of the butterfly and the side tails are the same as before, but--.

"Left, huh?

　They were both on the left, like a mirror image of the guy from earlier, like a common twin character.

　When I saw that, I had a bad feeling.
　I had a very bad premonition.
　And in this kind of situation, my premonition was right.

'Kyaaaaaah!'

　From the first floor - I heard another scream from the floor above me that I should have knocked down.

　　　　　☆

　Outside the dungeon, near the entrance to Tellurungeon.

'It's a monster called Unison Twin,'

　Celeste said as she heard the commotion and came over.
　It seems that the family's wits are now not limited to Cyclo's dungeon, but have knowledge of all the monsters in the world in their heads.

''Are they regenerative monsters?''
In a way. From what I hear, you're one of them.
What the hell?　...... Oh, father and son slime
That's what I mean. It looks like it has the same pattern as the parent-child slime, multiple individuals, but it's one piece.
So that means I have to take it down in a special way?
'Yes. You have to take them down at the same time or they will come back no matter how hard you try.
At the same time.
And it has to be the same person.
'Well, we're usually on the same level,'

　Celeste nodded with a furrowed brow.

'Normally we're on the same tier, so it doesn't matter if it's the same people at the same time, but this time it's a different tier: ......'

　Celeste said, and the adventurers around her, who had escaped from the first and second floors, buzzed.

'No way. ......'
You're talking about simultaneously destroying a monster that even Lyota Satou couldn't take down?
Even Ryota Sato wouldn't be able to give himself up.
What are you going to do?" ......

...... It's going to be dangerous, but it's Meeke.
Yeah, I don't want to risk it.

　Meeke Aulum.

　A new addition to the family, an evolved unique monster with the ability to "move up a hierarchy with the monster you're touching".

As long as she's touching it, she can move through the hierarchy, so if you collect her on either side of it, Lyota-san can take her down.

　There was a cheer at Celeste's words.
　Cheers for the fact that we had a solution.

　But it's much more dangerous.
　Meeke is level 50, with a mix of C and B abilities.
　The unison twins are quite strong from what we fought earlier.

　It could be dangerous for Meeke.

　Isn't there a better way?　If you use accelerated bullets to accelerate to the limit, you can go to .......

'I've heard the story!

　Alice appeared to me in my distress.
　She put her fellow monsters on her shoulders and said in her usual cheerful tone, "I'll take care of it.

"I'll take care of it.
For Alice?
Yeah, you know what? I'm...
...... I see!

　I remembered that.
　I thought it was worth a try.

　　　　　Star.

　Go into the other dungeon and come with Alice between the first and second floors of the tellurian.
　Alice goes upstairs and I stay on the first floor.

What about timing?
If you want to measure time, use the accelerator. We'll take it out the moment it's about to run out.
Okay!　T.O.!

　Alice's summoning magic 'All Might'.

　The moment I used it, my deformed character appeared.
　I look like a deformed stuffed animal, but my abilities are exactly the same as mine.

''Then let's go--Seno!

　At my call, me and Ree-chin simultaneously shot an acceleration round at myself.

　The accelerated world that left the summoned Alice behind.

　I ran out to find the unison twin on the first floor and Ryo-chin on the second floor.

　We soon found them.
　The Unison twin was moving sluggishly in the accelerated world.

　I know how long the accelerated bullets work.
　Before it ran out, I scraped it off first.
　In a meatball fight, I whittled away at the unison twin.

　I didn't use "Repetition" from buying time.
　I took down the alter ego, but that's because I didn't want it in there yet.

　I kicked it, I kicked it anyway.

　In the accelerated world, the Unison Twin couldn't even fight back and was beaten up one way or the other.
　Then, the moment the accelerated bullets cut off - he gave it his all.

　Time returns to normal and the Unison Twin disappears.
　I wait for a bit on the spot, it didn't come back.

　Furthermore, the pine tree, which had clearly revived earlier, did not.

Hey!

　Alice came up from downstairs.
　She gave me a thumbs up and showed me that she wasn't resurrected on the other side either.

'Feng ......'

　The adventurers greeted me and Alice with cheers as we walked out of the building after defeating the monster in its troublesome form.