Narrator's POV

*Boom* *Crash*

Inside, the crew was struggling with keeping everything in check.

"Nii-chan, please be careful there!" (M/N) looked to his side

"Don't worry (M/N), I'm fine." Iruma says while struggling with returning the heavy fish back in its container

"(M/N), Iruma, I'll leave these to the both of you! If any of them fall, I'll deduct half your pays" A crewmate ordered after going out to the captain.

"Y-yes sir" The two answered

"Nii-san, this is too harsh ..." (M/N) said.

"I kno- OH THAT'S DANGEROUS!" Iruma dodges as the fishes fall towards him.

"Nii-san!" (M/N) closes the cell and rushes towards Iruma.

As more fish fall out of their cells, the twins dodged every single one. A fish was about to hit Iruma...until everything stopped.

"What?" the twins looked at the frozen-in-place fish in confusion. They blinked their eyes, only to see a strange figure in front of them.

"Eh?..Eh?!" The twins were immobilised and speechless.

The strange figure waves their hand motioning towards the two, while two pieces of paper follow the motion and stick to each of the twins.

"Wha- 'Sold'? what???" They both read the paper

The figure seems to hum in satisfaction and they all disappear. Everything returns to normal, the fish fall to the ground but...the twins were gone.

In reality, the twins were being dragged by the now FLYING figure to who-knows-where.

"Where are we?" Iruma asked the figure

"Who are you?!" (M/N) shouted at the figure

"Ś̵͓̑͛̄͊̈́̇ǘ̴̧̨͈͉͔̱̲̖̫̇͋̄́̋̓͜͝ẕ̴̧̨̰̎u̶̫̞͎͎̹̰͌̊ͅk̵̳͓̜̐̾́ĭ̵̢̡̻̻ ̵̮͕͍͝͝I̸̭̦̋̅̌́r̶̰̞͉͎͐u̴̗̗̇m̵̹̯̟̳͍͌̿̃̔̋͋̓͗͘a̸̰̱̲̰̙̍͗̈ ̷̧̺̖̝̄̌͝a̷̮̜̱͚̮̾͗̆͒͠n̶̖͚̥͖̯͈̠̈́̍̈́̋̀d̴̡̳̯̝̙̗̞̤̣̦̓̓̐̍́́̕ ̷͔͉͈͐̃̋͜͠(̷̛͇̘̞̼͋̒̂̔̾̐M̷͉̮̹̪̲̊/̵̧̬̪̝̻̰̦̟̼̄̂͊͑̈́́͝N̸͜͝)̶͎̰͕͈͉͓͉͌͛̒̿,̷͙̼̮̾̓̀̌͝ ̶̧͎̣̥̂̒̐̐͑͆̕͠t̴͍̰͙̅̑͒h̵̞̃ī̷̗͌̈́̈͂̑̃̓̕͝ş̷̳̥̜̦̿̾̌̓͝͝ ̴͇̻̮̎̽̀͋͘͝͝ͅį̸̜͉͔̦͋̎̾̑̆̂̉̌͐̚s̵̨̛͉͙͚̗̠̅̓͌͝͝ ̸̖̭̼̲͖̺͎̈́̽́͘t̴͉̞̻̥̏͊̽̈̓̑͝ḩ̴̹̈̆e̵̢̙͔̰̼̙̜̠̝̒́͂̃̐̋̄͜ ̸̢̛̥̭̫̽̈͘͝N̵̢̛̪͓̹̟͌̌̄̽̽̀ê̵̛͎̰͔̳̒̈̌̚t̸̨͉͔̥͊̊̀̀h̷̡̤̼̦̠̹̟̐̋̑̌̅̇̉̉ͅͅe̷̙͉͍̬̊̏̈́̇̈́̀̉̑́͑r̷̪̔̽̄͝w̵̙̱͙͍̫̦͗̍̓͂͛ǫ̵̢̧͍̘̬͕̪̰̫̉̏r̴̛̛̜̞̟̫͖̱͕͓̱̣̓̒̐́̄͠l̷̡̨͇̼̠͓̯͎̍̾̃̾̓̉̃͗̔̕d̷̗̗̹̜̝͕͚̳̭̔̑̾̓́͋ͅ" The figure said

"W-what?" the twins asked in confusion

"O̴͎̥̼͌͋̈́̕ḥ̴̡͓͇̐̉͐,̷̨̦́́ ̵͕̥͈͔̲̣̲̐͊̌̌̓͋̔̓̀r̴̢̰̯͕̼̗̞͇̊̕ǐ̶̦̬̻͊̔̊g̴͔͕̻̯̞̮̓̊̾̀͗́̋̾̽͠ḧ̵̡̲́t̵̢̢͍̞͑̂́̅̃̉́̔͛͛.̴̝̤̬̱̟͑̎̈́̐͝.̸̭̫͍̟̪͑̋́̃͌͛̇́̇.̸̨͎̳͖͙̫̲̖̈͒͑̾" The figure realized as he snaps his fingers once.

"I've made it such that you may understand the Netherworld's language. Suzuki Twins, this is the Netherworld." He explained

"Netherworld?" The twins ask

"The world of demons" He answers

"DEMO-. wait, I can understand you..." Iruma realises

"That is because I've casted magic on the two of you." The figure explained

"..Magic?" (M/N) questioned the figure

"I am a demon, so it is only natural that I can use magic" He said

"A d-demon?" Iruma panics

"Makes sense if he has horns, can fly, and use magic..." (M/N) realises

"My name is Sullivan. Iruma, (M/N), your parents have sold your souls to me." The demon chuckled

"S-sold us to a demon?! But how can-...oh..." Reality hits the twins like a train.

"That really sounds like something they'd do..." The twins said in despair

A huge building is seen from the distance.

"T-that is...?" Iruma asks about the building they were heading towards

"My mansion." The demon answered

"Wh-what are you going to do?!?! WAHHHHHHHHH" Iruma shouts

...

"Eh" They both blinked.

The twins were sitting on a chair that comfortably fits the both of them and look down only to see the very same demon on his knee holding each of their hands.

"Can you become my grandchildren?" The demon named Sullivan suddenly asks

The room was large. A bundle of flowers were at each side of the twins, there was a baby mobile hanging from the top of their heads calmly twinkling.

"Huh?" the twins were too confused to even say anything.

"Actually, I'm single..but I've always wanted to have 'grandchildren'." He explained while thinking about what It'll be like to have grandchildren.

"Grand..children?..." Iruma spoke

"Really,I'm jealous of Levi and Belial! Always boasting about their grandchildren! They buy them everything and coddle them so much! It's fine isn't it? Isn't it?" He cries metaphorical crocodile tears.

"B-but we've already been sold to you...Are we allowed to say no?" Iruma asked Sullivan

"I will respect your wishes. If you two do not want to, you may decline! " He answered

"What do we do???" The twins thought at the same time

The Suzuki Twins were similar at some points, they were kind hearted people,..when people asked for help,...even when they weren't asked to,...even in the most unreasonable requests...they haven't said "no" to any of them...even they themselves are amazed by how they were so kind-hearted.

"I-in a situation like this... One would normally decline..r-right?" They thought.

The twins looked at each other, then looked at the demon ahead.

"U-um, we'll-" Iruma was cut off

"HOWEVER!!! That's why I'll be giving my all to ask for your approvals! Please, just think of it as helping an old man whose days are numbered! I beg of you!!" The demon uses an effective set of words to weaken the twins.

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Ranking the words the twins are weak against:

1. "Please",

2. "Help me",

and 3."I beg of you"

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A paper was brought in front of the twins, they stamped the space to put it and sighed in defeat while Sullivan does a happy dance.

"Even though we had the chance to say no...We ended up becoming this demon's grandchildren..." They cried

After 14 years of misfortune, the twins have gained the habit of accepting anything.

...

"Well then, since everything is set." Sullivan once again snaps his fingers

*Poof*... The room looks more comfortable than earlier. There was one VERY large bed, two sets of pyjamas sitting on the bed, there were two bookcases, two study tables, and two closets.

"What is this?" (M/N) spoke up

"Well since you are my first grandchildren, everything you need is guaranteed! Food, clothes, shelter...and" He snaps his fingers once again

"EDUCATION" The two boys who were only wearing their casual clothes are now wearing what seems to be a school uniform.

"Awww, it suits you two perfectly, how cute! You see, you two are going to attend demon school!" Sullivan claps

"Demon school?..."The twins ask uncomfortably

"Thanks to those parents of yours, you two weren't able to properly attend school and had to work since childhood, right? But don't worry! Because Ojii-chan has done all the paperwork!" Sullivan happily announces to the two

"Ojii-...chan?" Iruma said

"Ahhhh, what a nice sound that gives. 'Ojii-chan'! Let's take a picture together at the school entrance ceremony!" He happily wonders what the picture would look like

"W-wait" (M/N) said, confused on how fast everything is going"I thought Kira-sama was joking about her book about demons!!"

"There are no prior examples of humans ever attending before, but you two won't be eaten if you aren't exposed." He remembered

"W-WE'LL BE EATEN?!?!!!" The twins panicked

"Pampaaam!!! This perfume won't expose your scents as humans so you two can relax." Sullivan said as he dumps a bucket-full of perfume

"I was so happy you two are such good kids." He said

"U-uh w-what?" The twins looked at him, confused

"You two would have been on my dining table tonight..." He said in a deep intimidating tone

"Wh-what?..." The twins couldn't hear what he said

"Hmm? did you say something?" He acts innocently

"We said nothing..." They both said

"This room will be yours starting today!!" He told the two boys

"Huh? Ours?"

"The school entrance ceremony starts tomorrow morning, so get some rest you two! Goodnight!" He says while walking to the door, exiting

"...Our own room...for the first time.... it's been a while" Iruma said as they both change into their pyjamas

"That's true....it's been chaos all the time..." (M/N) said as they both got into their respective beds.

"This...is just a dream...right, Nii-san?" (M/N) asked as the lights went out

"I...think so" Iruma responded

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(M/N)'s POV

What a strange dream I had...a demon...wait.... I looked around only to find... the same room I fell asleep in

"It wasn't a dream?!?!" Nii-san and I looked at each other in disbelief

Just as we said that, "Ojii-chan" comes to the door

"Iruma-kun~,(M/N)-kun~! Good morning! Did you two have a good night's rest?" He said as he stepped into the room. I noticed someone by the door who had red hair....

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Small Time-skip

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Narrator's POV

"Ah~ I'm so happy! My grandchildren's school entrance ceremony! Photo~, Iruma-kun, (M/N)-kun, Stand over there~" Sullivan points to the sign pointing towards what seems to be the school.

"T-this?" Iruma asked while walking towards the sign

At a wave of his hand, Sullivan translates the text into words the twins can understand

"Oh! It changed!" (M/N) said in amazement

Iruma stood beside the sign while (M/N) stood by his left and Sullivan bent over slightly to match their height. The twins did a peace sign while Sullivan made a circle with his pointing finger and his thumb while the rest were slightly curved making a "666" sign

*Click* the camera flashed

"Ah~ I'm so happy!~It's their school entrance ceremony!~" Sullivan exclaimed

Walking to the school (M/N) looked at Iruma in sadness

"(M/N)...your taking this quite well are you?" Iruma worriedly asked

"No, it's not that...more like I'm just confused..." (M/N) replied

"U-um... Opera-san, was it?...The school...?" Iruma asked

"Is over there" Opera points at the large school campus in the distance

"..." The twins looked in amazement, probably from the structure...but then again, the mansion had a shape as well

*distant chattering* The twins were confused, they were hearing chattering but there was no one else around...until they looked up

"W-whoa" (M/N) was mesmerized by how amazing it must be to fly that high

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Small Time-skip

As they arrived, they heard a bunch of students in different uniforms greet the entering students

"All right! Now, I have preparations to attend to, so I'll be going on ahead" Sullivan said as he zapped away

"U-um, then what about Opera-san...?" Iruma asked

"Have a good day."Opera bowed

"Yes.." The twins said

As they walk inside they were stopped by the same demons greeting the students

"Oi, you two!" One of them said.

"Yes?" The two asked worriedly

"The auditorium is that way" He said while pointing

"Ah, yes. Sorry." Iruma said while (M/N) turned back to the same demon and bows before running after his brother

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"Hoy, something smells delicious" The demon sitting beside (M/N) said

"Don't stand out. Don't stand out" The Iruma thought in chants

"Amazing...everything here is so different from humans..."(M/N) thought as he looks around him

Demons were talking amongst each other...before someone calls them out

"Silence" He ordered, to which everyone complied

"Is he a teacher?...How scary..." Iruma shuddered

"Thank you for waiting. At 6:06 AM, the demon school, Babyls. The school entrance ceremony shall begin." A teacher said

"All present, stand up! Sing the school song!" The student standing beside the teacher ordered

Everyone stood up as the music started to play

"Humans wholly are our food. Eat their souls, blood and meat, without leaving anything behind. The flapping sounds of black wings. To those who tremble, we are demons. The song that spills from red mouths. Let's sing out loud, all of you~ We are demons~" Everyone but the twins sang because they stood there frozen definitely not wanting to stand out.

"And next is the principal's speech". The teacher announces

"Yeah, the next demon king!" the crowd cheered

"Demon king?" (M/N) thought

A familiar figure walks up to the stage

"Iruma-kun!~ (M/N)-kun!~" It was Sullivan

"It's Ojii-chan!~" He waves his hand to the twins in excitement

"He was the principal of this school!!!" They were shocked

Many voices were heard questioning about the twins' names

"That's right~ Actually my two grandchildren also enrolled here. They're so cute, so cute..." He lovingly says

"Please don't Ojii-chan" They cried

"And I took a picture of them, here it is!" He said while completely exposing their faces using the photo from earlier

"THE PHOTO!!!" (M/N) sobbed

Comments were heard around the room. While the twins shook their heads in embarrassment

"I will send everyone copies later~" Sullivan said

"Nobody wants that Ojii-chan" They cried

Suddenly, Sullivan walks off the stage having everything he wanted to say.

"..Alright next, a speech from the freshman representative"

"The freshman representative, Asmodeus-kun."

Many girls were talking about this representative, and how handsome he looked

The twins sighed in relief when all the attention that was once on them moved to him

"eh?eh?....*Ahem* In place of him, the speech will be made by one of the scholar students, Iruma-kun!" The teacher said as he read the sudden paper floating in front of him

"Why!?" Iruma flinches

"pff-" (M/N) hold in his laugh, knowing Sullivan was the one who made the change

"(M/N)..." Iruma cried

"Good luck, Nii-san" He said in an apologetic tone

Iruma stood up and walked to the stage. Many whispers were heard as he was walking

(M/N)'s POV

Nii-san stood there completely still, I heard others talk about him and they weren't nice. Because I'm quite far and my eye mask is covering my eyes, my view of the stage is quite blurry like a thin string if you looked at it from a distance.

"Aberuhauke" I see the picture of us earlier move onto the table, I'm guessing Ojii-chan wrote something for Nii-san. As Nii-san said that, everyone present jolted in shock

"What's Nii-san saying? What's going on?" I thought

"Tarutadari, iusabebe." Nii-san continued as the others got even more scared

"Just what did Ojii-chan write on that paper?..." I think of what those words meant but all that came to me was some sort of wish...If only I had properly listen to Kira-sama and her 'crazy' book...

"Risuturu, aburuze. Sutumanu, aberuge. Uru, Mahoraba. Tsurezaza...!" He continued, All I remember from Kira-sama's lectures about her book was that some words are a taboo...I'm guessing this was one of them...

A small light engulfed my brother for half a second. There was a moment of silence until everyone cheered saying how amazing his courage saying those words in front of everyone.

"U-um, hey, what exactly did Nii-san say?" I asked the demon beside me

"That's your brother? Amazing dude! He said a forbidden incantation as his speech without blowing up!" He praised my brother

"Thank you"I told the demon"I was right... it was the taboo" ...I couldn't believe tha-...y'know what I could believe it... he did read good bedtime stories when we were younger .

Teachers started crowding Nii-san a bit and talking to him.

"I'm guessing they're mad" I sweatdrop. I see Nii-san shaking a bit, he's heard of it

"Huh?...What's going on? What's he saying to Nii-san?" I saw the same person who was supposed to be the one to deliver the speech approach my brother

Narrator's POV

"My name is Asmodeus Alice." The pink-haired boy introduces himself to Iruma

"Hello..?" Iruma replied

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Small Time-skip

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Outside, the two boys, Iruma and Asmodeus, face each other

"I was the one who was supposed to make the representative's speech. The crime of tainting that important stage is worth a thousand deaths!" Asmodeus declared

"w-what?..." Iruma was confused

"Sullying my moment... I have the right to determine if you're a worthy demon or not!...Right?" The crowd cheered for the upcoming fight

"Now, prove me that your ability is above mine!" Asmodeus shouted while throwing a ball of fire towards Iruma.

Various explosions around was made, some even affected the building some students were in

"STOP IT YOU TWO, THIS IS UNSAFE!!" (M/N) yelled, yet they did not stop

"The both of you are just gonna end up in the nurse's office!" (M/N) yelled once again

"He-he's righ- WAHH-" Iruma was about to stop until another ball was thrown at him

"You little-" Asmodeus threw another ball

As the battle continued on, Iruma kept dodging all of Asmodeus' flames until they both were exhausted. All in 20 minutes.

"You bastard! Why can't I hit you?!" Asmodeus looked at the boy in front of him

"I-i'm sorry-" Iruma stopped talking when he heard the other student's whispers

"Oh? He hasn't even attacked once?" "Does that mean he doesn't need to lift a finger?"

Even though they were supposed to be whispers, everyone heard them. The two boys were having mixed feelings, one was angry, while the other was in denial.

"So...I'm not even worthy of you attacking, is that it?" Asmodeus gritted his teeth

"Huh?- No no no no! I'm just nothing more than a bug!" Iruma shook his head in disagreement

The crowd cheered "Hahahaha! He thinks you're worse than a bug!" One student said

"...What humiliation!" Asmodeus gets even angrier

"If magic doesn't work, I'll just use martial arts to have you yield! I'll tear you limb from limb!" He said as he makes a flaming sword. Once the sword was finished, he immediately pointed it to Iruma and began to run towards him

"GET AWAY FROM THERE" (M/N) pointed at a blonde demon girl and other demons near her. The demons looked at (M/N) but as they looked back at the battle Asmodeus' sword was getting closer to them

Iruma uses the opponent's strength to fend off the attack. But it was only redirected to the girls in the crowd

"Ahhh!" The blonde stood there waiting for impact...but it never came

As Asmodeus was getting closer, Iruma got ahold of his waist and bent backwards....but due to the incantation he said on the stage earlier, instead of falling...Iruma's back forms a bridge while Asmodeus took majority of the damage with his upper body which caused him to go unconscious.

The crowd cheered while (M/N) laughed at his unfortunate brother. All Iruma could this was "It's over..."

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Chanting forbidden magic at the entrance ceremony, and beating the top student! A thoroughbred, the powerful attack from the honour student, Iruma!" A student read the school newspaper posted.

"Amazing!"

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"Ah~ As expected of my grandson. What a good start Iruma-kun!~" Sullivan happily waved his arms around