(I forgot to mention it in the explainations, but the chapters will either be small or explain at lot for not much, in that case a short one- and i'm not good with angst, so sorry if it's not what you would've wanted to see in a good Bsd fanfic or if you think it's cringe, just don't attack me. And i'll repeat it again : English. is not. my first language !
That being said, enjoy this chapter !)

Pov third person

Our story begins a very, very long time ago with a young girl, who were friends with two siblings, Jun'ichirô and Naomi Tanizaki.
At that time, despite her being a bit older than the duo, they became close in a short amount of time and soon turned into an inseparable trio. While Jun'ichirô was the "average" and rather timid one and Naomi being the more bold and strong-willed one, Y/n was gentle and were the voice of reason between them, having to get them out of trouble more than you would think.

But one day, it all fell down when Y/n's family had to move out for...reasons that are still unknown for the Tanizaki siblings. The trio of pre-teens looked at each other, not knowing what to say without the fear of making the moment worst or awkward.

Jun'ichirô : Do you really have to leave..? This seems rushed, not to mention it feels...wrong.

Y/n : I'm sorry, mom and dad didn't exactly told me why we're leaving. But i agree with you, something feels clearly wrong..

The girl sighed before holding her friends hands with a small, but genuie smile on her lips, which made the siblings looked at her in the eyes, even though her right one was hidden behind a large bang.

Y/n : But i promise that i'll come back to Yokohama, just for you guys.

Upon hearing this, Naomi smiled before pulling her into an almost bone-crushing hug as tears threathened to run down her cheeks any second now, not like she actually cared about that part at the moment.

Naomi : Then we'll wait for you, no matter how long it will take ! - She also promised to her dear friend, Jun'ichirô agreeing with his sister before hugging the girl with less strenght, not wanting to crush her.

~✨☆✨~

Back to today events, at the Armed Detective Agency, Jun'ichirô who just finished his work gets up from his office chair while briefly checking the documents in front of him.

Jun'ichirô : {It's been years since the three of us did that promise, does she..even remember us..?}

His daydreaming suddenly got interuppted by Atsushi, who waved his hand in front of him when he realised his co-worker seemed a bit down.

Atsushi : Tanizaki..you look..upset since you arrived this morning, are you okay ?

Jun'ichirô : Hmm ? Oh yeah don't worry about it Atsushi, i was just thinking of.. an old friend who left.

Atsushi : Really ? What happened to them ?- O-of course if it's alright for you to tell me ! - The white-haired boy says nervously when he realized it might cause Jun'ichirô to feel more down than he is right now.

Jun'ichirô : It's fine. You see... when we were younger, me and Naomi became friends with a nice, but kinda strange girl, and we were almost always together. Whenever it was or night we were never tired of seeing each-others, but...she's not here anymore- not that she died ! It's just that she had to move out.

Atsushi : Oh really ? What was she like ?

At the exact moment he asks, Naomi steps into the room before standing next to her brother, followed by Dazai, who has been listening to their conversation the whole time.

Jun'ichirô : She was caring..selfless and so smart..and now that i remember, i've seen her losing her temper only once since we've known each-other-

Naomi : And she was as pretty as a starry sky ! Aw the look in her eyes was so gentle and patient

Jun'ichirô and Atsushi both sweatdropped while Dazai's expression lit up when Naomi mentioned her friend's beauty, staring at the clerk of the Agency with star gazed eyes and a big comic smile on his face.

Dazai : Oh, really ? Is she single ?

Naomi : Really ! And last time i've asked her...well she said she doubted she would find anyone who would be interested in her, but then again it's been a while so...

Dazai : Eeh, why would she said that ? This girl seems like a sweetheart from how you described her

He fake pouted while Jun'ichirô sweatdropped once again, knowing that Dazai would definitely ask her to join him in a double suicide if they ever met.
Why did he suddenly remember this girl ? Was it because today was the same day she left years ago ? No, it could only be a coincidence, at best..

Atsushi : Oh, i just remembered ! Has anyone seen Ranpo ? He left this morning and still hasn't come back.

Dazai : Eh, knowing him he must be wandering again. Better call him before Kunikida decides to give his unfinished work to someone else-

He gets interrupted by Kunikida, who give him a sharp headslap to the back of the head in an upwards motion
(author note : Or as NCIS fans call it : a Gibbs slap- he would totally do this-)

Kunikida : Like you're the one to talk Dazai ! If you have time for talking, you got time for working !

Upon hearing this, Atsushi and Naomi both jump in suprise before quickly returning to their desks, unlike Dazai who didn't move before asking one last thing to Jun'ichirô despite Kunikida's complaints.

Dazai : I forgot to ask you, what is your old friend's name ?

Jun'ichirô : If i recall correctly, her name was...Y/n

[~✨Meanwhile✨~]

"Yokohama, 10 minutes stop" a monotone but loud voice annouced through the speakers as passengers got up from their seats, most of them pushed each-others to the exit while one sneaked between them while apologising multiple times.

Y/n : Excuse me, coming through- oops, didn't mean to do that, my bad !

A tall, young woman with [E/c] eyes and long [H/c] hair with a large bang obscuring her right eye steps out of the crowd, she sighs of relief when she finally manages to get off the train without any more trouble, she took a good minute to look around while moving out of the others way before smiling to herself.

Y/n : {Finally, back to Yokohama ! It's been so long..}

At the same time, Ranpo, who were walking aimlessly through the streets of Yokohama since this morning, passed in front of the train station. He didn't pay attention to anything until he felt a...soothing presence, he opens his eyes briefly and turned around to find where it's coming from.

Ranpo : {The train station ? But it's never a calm place, however...}

He continued to move foward, following this new sensation, wanting to know who it could be coming from. He's the greatest detective in the world, he had to know the answer ! He stopped abruptly when he found...her.

Ranpo : Woah ! - He exclaimed from behind Y/n, making her jump in suprise before she turns around, now facing the dark-haired man who were behind her.

Y/n : {What the..} Erm, excuse me..?

Ranpo didn't answer right away, instead he just stood there while looking at her, which confused the [H/c]-nette, thinking he had mistaken her for someone else until he starts speaking again, this time with a smile on his face.

Ranpo : So you're the one i've been looking for, don't you worry your pretty little head anymore ! Cause right now you're with the greatest detective ever, me !

They both stared at each-other for a while, Y/n tilted her head as Ranpo pulled his glasses out of his inverness cape before he activate his ability, "Ultra-Deduction".
A few minutes passed again, making the moment even more awkward than it already was for Y/n, Ranpo opened his eyes again, they looked like shining emeralds, he smirked knowing that the young woman was thinking as he spoke again.

Ranpo : If you want to find what you're looking for, go to the Armed Detective Agency with me, it'll help you.

Y/n : {The Armed Detective Agency...? Oh right, i remember seeing several things about them online when i was buying train tickets for Yokohama.} Oh, uh- sure ? If you don't mind, can i ask your name first ?

Ranpo : What ? Don't tell me you're hesitant even after you saw my deduction skills in action ? Fiiiine...i am Ranpo Edogawa, what about you ? - He asked, noticing the star-shaped silver brooch with a round gold gem she had on her.

It is true that Y/n was still hesitant, after all she just got out of the train station and the first person she met is a member of the Detective Agency ? That sounded too good to be true and almost felt like a Wattpad or Quotev story...WAIT NO-

But...she had a feeling she could actually trust Ranpo, and besides it's not like anybody else would've run up to her to offer her help, just the thought of it made her chuckle lightly.

Y/n : I am Y/n, nice to meet you Ranpo-

Ranpo : Y/n, huh ? I like it, but i'll call you N/n, it's catchier ! Now, are you coming with me to the Agency ? Good, cause you'll have to lead the way.

The [H/c]-nette just gave him an "Eeh ??" look as he takes her hand to drag her along with him, while the new duo walked together Ranpo glanced at her a few times. He knew she will bring something new to this world, not sure what it will be for now, but...it's really nice to see a new face.

(Well sh*t this isn't how i wanted to end this chapter, but i'm running out of decent ideas for now- i promise, the next chapter there will be more "action" and more infos about the story if i can add them without spoiling anything by accident. Now if you'll excuse me i have to scream internally until i figure out what the heck did i do wrong, have a good day/night !)

Edit : I just realised- for thoses who don't read a lot of "X reader", here :

Y/n = Your first name
L/n = Your long name
H/c = Hair color
E/c : Eye color
N/n Nickname
I'll probably add more in the future, and i'm already on a prototype of the 2nd chapter let's gooo-