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Language:
English
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Published:
2025-08-16
Updated:
2025-09-14
Words:
1,230
Chapters:
2/?
Comments:
23
Kudos:
131
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BSD react to BEAST

Summary:

The organizations of Yokohama unknowingly found a letter on their tables and once they opened it, they got blinded by a light and got teleported to a doll house with a lot of chairs, tables and a floating hologram on the middle..with a young girl calling themselves Athanasia de Celestia or Nana.. Why? For her own entertainment of course! And bribing them with the information about the book and the alternative universes!.

Or, a BSD react to BEAST fic.

Notes:

Heyyo!! (≧∇≦)/
I recently got an ao3 account so don't expect much! And I don't know how to use it•́︿•̀ if you know how to please send tips!.. I hope I dont get the ao3 curse since I have skwel (´-ω-`)
Also this work in progress!!

Edit: I re write this since the writing was not IT so I hope y'all would like the re write ( ꈍ꒳ꈍ)

Anyways back to the topic
I haven't seen an bsd react to beast fic lately and I wanted to this for funsies!! This fanfic might be ooc (out of character) since I don't really know how to make them canon!!
I wanted to give them information about the book and other stuff!
I also added some of my hcs in this fics but I really hope you all would like it.. ( ꈍ꒳ꈍ)

 

Thank you for reading (if you did loel) ヽ(≧∀≦)ﾉ

(See the end of the work for more notes.)

Chapter 1

Chapter Text

It was a fairly normal day in the armed detective agency. The president working in his office, Dazai being annoying and bothering Kunikida as usual, Kunikida snapping another pen and strangling Dazai. Atsushi was talking to Kyouka, kenji watering and looking at his plants.
Tanizaki and Naomi were being themselves..Yosano was sitting on top of Ranpo's desk gossiping about some things she heard from the mall while ranpo was munching on some sweets and chips...

But the atmosphere quickly changed when a mysterious envelope slowly dropped on their table..

"Huh?.. What is this?.." Asked the white haired boy with a hideous haircut.
Everyone turned their head to the envelope on the table and the boy, Cautiously and hesitated if they should open it, "should we open it?.." "I don't know but it might be dangerous!.." "We don't know if it is laced with an ability—.."Dazai don't—..!" Dazai was being a dumbass he is, grabbed the envelope and opened it, they immediately covered their face and trying to protect one of another.. The president was signing some papers then saw the light coming out of his door and a lot of commotion outside his office. He decided to go outside and check but he too was blinded by light.
.・゜゜・

in the port mafia building
There was a loud creak , A man was feeding a little girl with lots and lots of sweets but they stopped when they both heard a voice and turned their head to that voice "Boss, forgive my interruption but there's a letter for you." Said the ginger haired executive, giving the envelope to his boss while the girl peaked her head to see what was written on it. The boss opened the envelope, a list of names was written there.. Somewhat he gathered the specific people in his office, he explained the situation and before he could finished. A flashed quickly blinded all of them in the office startling half of them since it was unexpected.

.・゜゜・

Slowly half of the people in the room got their senses and consciousness back looking confused then saw a rat and quickly got to their fighting stance ready to beat the shit out of him for harming their respective leaders. Then they got startled by a smoke slowly appearing, on cautiousness they quickly covered their noses thinking that inhaling the smoke could kill you well.. Except a mummy and the best detective.

.・゜゜•

After the smoke cleared there was a young (?) girl, grinning and giggling because she successfully kidnapped them!.. They all immediately got cautious around her, preparing to kill her but before they could attacked, the young girl introduced themselves in a dramatic way.. (๑`^´๑)

"Behold!!, it is I, Athanasia De Celestia!!.. Kyahahha!!..but I mean no harm at all!! I just want to show to all a little surprise that's all!!.." The young girl finished her speech but it didn't soften the tension but it harden, they were all suspicious of her not believing her one bit.(T_T).

 

AFTER HOURS OF CONVINCING SHE FINALLY CONVINCED THEM (THANK GOODNESS I WAS JUST LAZY ON THIS PART SORRI╥﹏╥!!)

"Ranpo is she right? About that she meant no harm to us..? Except for Dostoyevsky and whoever is with him.." Asked the worried white haired boy looking ready to fight and protect his colleagues..

"Mmh mmh!.." Ranpo stopped eating and looked at his colleagues. "She has information and yeah its swafe since...." He answered the question while continuing on munching so chips and nudges to dazai annoying chuuya, the dog got very annoyed and started to strangled him.

The other organizations were also reconsidering to trust a young girl who kidnapped them, their thoughts was quickly bothered by loud yelling from the black haired girl again..

"Soo?! Are you like guys ready to react??.." She asked voiced laced with cheerfulness.. Somewhat they agreed to her idea of them watching the important things they need to know.

"Yes." All of the leaders in the doll house said in unison and nodded to one of another.

"I have a question,miss!" A young boy with blonde hair raised his hand to be polite.. He was smiling widely considering the situation. "What are we going to watch?" His voice covered with confusion.

"Ah! Well you guys are gonna watch..!!" Imitating drums sound for dramatic purposes.. "THE BOOK!!" She says happily, her last words fully caught everyone's attention especially a rat..

"The book!!.. You all are gonna react to it!! And what's inside of it!!..if you don't know the book can make things into reality!! "

That quickly peaked their interest and Willingness to take the book.

"But first!! I want you all to err—.. Go sit on your respective chairs!!" She says happily watching them go to their chairs.

"Ne.. Cibiko~?" A mummy was nudging him

"Stop calling me that!!" The ginger yelled at him wanting to strangle him again.

He stopped yelling after Dazai whispered in his ear.. "Sit next to me that rat is here.." Chuuya then nodded since Dazai was serious which mean that rat meant dangerous to the people in this room..

The agency wanted to protest about Dazai sitting next to a executive before Dazai shut them up.. And the post mafia know what it meant when the soukoku sit next to each other looking serious except for Dazai since yk..

*She clapped her hands and quickly did a presentation about the doll house, what's happening, etc.*

"Oke dokey!! Is everyone ready?!.. "

Everyone quickly agreed and nodded their heads..
But before they could reacted, mori looked like he saw a ghost which is true.. Dazai and Ango was speechless and even shocked.. Dazai stood up from his chair, the other members of the agency looked at him (expect ranpo since he knows) with confusion. Dazai quickly ran to Oda, hugging him meanwhile Oda looked very confused as they were..

"B-but I.. H-how?.. I watched you die.." He softly murmured the last words only for Oda to hear..the agency was surprised since they never heard Dazai struggling to find the right words. Chuuya and akutagawa looked at the man quickly noticing him, it was Oda Sakunosuke, a mafioso who doesn't kill and made Dazai leave the port mafia..

"I don't know either.. But I am happy to see you—.. " Dazai dragged Oda to sit next to him then someone also appeared everyone turned their attention to that person, that person was Rimbaud standing there looking like a lost dog. Before he could react Verlaine was in front of him holding his hand and looking somewhat happy.. Hmm I smell gayness from Verlaine..

"Are there more people coming?.. " asked the doctor with a butter fly hair clip

"Nope! — thats all! Now be quiet! It's starting! Mm.." The brown haired 'adult' then continue to eat.

Chapter 2: Update♡

Chapter Text

HEYOO!!
I am NOT discontinuing this.
I am simply just updating you all♡
I am currently studying, working on my art commissions (not really) and some other personal things.
The final exams are almost here! (September 20) my mother told me I should study, which I did since I really don't wanna fail and disappoint them.. Also I am half asleep while making this lol. If you see any mistakes as you know I am half asleep hehe.. SEE YOU GUYS SOON TAKE CARE♡♡♡

PS: im making the chapters in secret hehe.. ( •̀ ω •́ )

Notes:

Heyyo!!
I hope you all like it TEHEHE ≧﹏≦
I hope I made it canon (*ˊᗜˋ*)
Anyways I will posting regularly since I don't really have motivation to write BUT I WON'T ABANDONED IT!!

Kudos and comments are appreciated!! ♡♡
Thank you for reading♡♡!!