Upper Moon

" This is.." Allen said as he look at the maze like construction made by countless tatami.

A second ago, they entered a normal small building then suddenly they appear in this place.

' This is shown on the last episode of Demon Slayer, but seeing it in real life is truly breathtaking ' he thought while the sound of Biwa echoing throughout the whole ' infinity castle '.

" A domain ? " Yuechan first word after she enter the ' infinity castle '.

" Domain ? " Miza ask, not very familiar with the name, because for the Demon like them, they called it ' Demon Art '.

Instead of answering, she look at the moving ' room ' around and said. " But it's very weak, it only effect is to move the ' room ' and to teleport anyone to any place once he/she inside. It seemed that the ' caster of this place only learned a little about space law. "

Miza narrowed her red eyes because she can't understand any words she said but she didn't try to ask her.

' A domain, it seem that Yuechan thought that Nakime's Demon Art is a domain. ' he thought.

" Huh ? " Allen said when he notice there's an 8 presence looking at them.

Then suddenly his place where he standing change and move to another place.

In front of him is 6 bowing demons, only 1 is standing and a girl with Biwa is still playing.

" Miss Yue ? " he ask when he notice that she is not with him.

Miza look at Allen confusedly.

' Didn't I ask Nakime to teleport us here. ' she thought.

She already used telepathy to the Biwa demon.

" Don't worry, I'm here " an ice cold voice resounded.

Allen and the other Demons look at the floating person.

The Demons widened their eyes looking at the impossible feat she's showing. They wanted to ask their master but even she was dumbfounded.

" Didn't I tell you, this ' domain ' is weak. " Yuechan said as she landed beside Allen. She look at the Demons and frown.

The others are still look human but the others are like a mutated creatures.

" Miza-sama, why are letting a human to enter this place ? " A frail looking demon with a huge bump on his head and two small horn in his forehead.

Fear and nervousness are visible in his eyes.

His eyes like the other Demon except Miza has a kanji word ' Upper ' on left and ' Number ' on right.

The other Demon didn't have same reaction. A demon with a number 3 and has a pink hair and stripe tattoo on his body are looking at them with a smile, like he found what he was looking for.

A beautiful young demon with a long black hair and has a kanji word ' Upper 6 ' are looking to Yuechan like a spoiled brat. Beside her is a tall demon with black hair and the other half is green. He is blocking the girl like he is protecting her.

" Ne... Miza-sama, who is that beautiful lady...ahh... she's the most beautiful I ever seen, more beautiful than that Hashira...I want to collec --- " A demon with a long long blonde hair and a kanji word ' Upper 2 ' said. He is holding a fan while laughing elegantly and looking to Yuechan.

* Slice * * Bang *

The demon was interrupted when he suddenly thrown hundred meters away from them living a two decapitated arm.

The demon, especially the Demon with a 6 eyes and has kanji word ' Upper 1 ' shock.

Too Fast !!!!

That's all in their mind.

They look Yuechan before they encircle her.

" Stop !!! " Miza hurriedly said.

The demons look at their master confusedly.

" They are not an enemy and your resistance is futile in front of her. " she said.

" Mortal, tell to your ' pawn ' that is just a warning. " Yuechan said and she swing her bloody ice sword to rid of the blood before it disappear.

Miza look at Yuechan calmly but inside she's fear of her.

' It's not a breathing technique or any other skills, just a pure strength and where did she get that ice sword ' she thought while her palm is a little wet.

" Urghh " a groaning voice sounded and look at the demon with a decapitated arm. The demon walk toward them and look at his decapitated arm that has been turned into ice. He look at Yuechan only meeting with a glare, he bow his head in fear.

" Can you also heal them ? " Miza ask. It would be great advantage if they will be immune to sunlight because Nichirin Sword won't work on them anymore.

Allen look at Miza with ' do you think I'm idiot ? '

" No! " Allen said sternly.

" Miza-sama your ' cured ' ? But your still completely a demon. " the little demon girl said because there's still bloodline suppression feeling when they look at her.

" All my abilities remained except for sunlight weakness and craving for blood. " Miza said which makes their eyes widened and look to Allen like they will force to ' cure ' them also.

Some of them turned into Demon because they don't have a choice. Now there's a ' cure ' and their ability will still remain. But after they remember the frightening woman beside him, they could only swallow their desire.

" The what are they doing here ? " a demon said.

" He made a deal with me. Kokushibo, I want you to train him. " she said.

" Isn't he a human ? Why does he want to train with me.? " Kokushibo ask.

" Because you're the strongest swordsman and breath user alive " Allen said.

Kokushibo narrowed his 6 eyes and look at Allen's eyes. He can feel fear at those eyes, not befitting for a swordsman but there's a little will to learn.

" Very well " Kokushibo said. He wanted to see what this human can achieve, if he was with the girl that stronger than his twin brother, maybe there's also a potential in him.