Past, day after Akai and Furuya failed to save Scotch

Rye and Bourbon (who wasn't currently Bourbon) met on the roof of their failure to talk in private

"So...what now?"

"Now we continue with our mission, Scotch died to protect everyone he cared about, it's why he destroyed his phone while killing himself, the best way we can honor him is to continue our mission of taking down the Black Organization"

"So I guess that means we continue as things went originally"

"Yeah, but we might be suspected even with you supposedly killing a traitor..."

"I know, so what are we going to do about it?"

"Due to the fact that we'll both be on suspicion let's figure out a code of some sort to let each other know that we're well and truly alive if something goes wrong and one of us thinks the other is dead"

"Maybe...maybe saying things that are only known about in the future with a little bit of this timeline thrown in?"

"That could work, maybe...maybe using real names also will work since you know..."

"Yes I do indeed know what real names mean for a NOC"

"You sure we can't bring in Kir once she joins?"

"Nope, too risky if she doesn't actually remember the future, besides it's probably better that she doesn't considering..."

"You have a point Rye you have a point, so what other codes can you think of for positive identity in case of believed death?"

And so the two come up with several codes to confirm that the other was actually alive depending on the situation

Present

"It's still surprising that the Organization never got so suspicious that we had to 'kill' our identity and go back to our actual job thus forcing us to use the code to confirm we were okay, though that doesn't mean things were easy in regards to communication with each other after your ousting Akai"

"In any case we all have places we need to be to keep the Black Organization off our backs, Akai is supposed to be dead Furuya is supposed to be getting ready to become Amuro Touro and getting friendly with Ran's father and I am supposed to be at the agency pretending to be a kid when in all actuality I'm a teenager stuck in a kid's body"

"I really do need to get to my new apartment and get things rolling for the first case we see each other at since my 'death'"

"No kidding red guy"

"Don't remind me"

"Red guy?"

"Don't even dare Kudo"

"Fine, by the way I think we might be able to figure out the mystery of KID soon, so both of you better have a good disguise ready, no Okiya before the other case where he takes pictures of you that you have to get back, we do not need KID suspicious about you before then"

"I know, don't worry I think I have something that will work short term"

"Good, Furuya..."

"Don't worry I also have something that will work in the short term as well"

A week later late at night Furuya and Akai are at the Kudo house and are shocked by each other's appearance

"Akai?"

"Yes, Furuya, are you seriously..."

"Don't knock it considering what you look like"

"It's not that it's just...that hair color doesn't exactly look right on you"

"Yeah well...that disguise doesn't look the greatest on you either, and the fact that your face still look pretty much the same will be a huge red flag if an Organization member shows up"

"Oh this isn't the complete disguise, I'm waiting for Kudo before everything is finalized"

"What for?"

"You'll see"

Fifteen minutes later and Kudo comes with supplies to finish Akai's disguise, which was a combination of Scar Akai, Okiya Subaru, and a mix-match of tv characters. As for Furuya, he had darkened his hair significantly, his skin tone was pale, he had a scar on his cheek and was wearing round glasses along with clothes that were generally not anything he would typically wear

"So, are we ready for the showdown?"

"Yes, what's the plan anyways?"

"You two stay in the crowd unless I signal you that the mysterious person at KID heists is there, I'll be chasing after KID until then, don't worry my signal will probably be pretty obvious"

"Let me guess, one of your soccer balls"

"Nope, I try and get KID with my soccer balls a little too frequently for that to be an effective signal"

"Understood, but you're sure we'll know the signal right away?"

"Oh yeah, it's going to be a pretty obvious signal trust me"

Later that night they found out what the obvious signal was, Kudo's watch/flashlight/sleeping dart projector flashing in what appeared to be random order with the occasional light on KID but was actually Morse Code telling Akai and Furuya the location of their mysterious helper, also letting them know that the mysterious helper was dealing with a Snake to allow KID to escape safely once more. As for the mysterious helper the three ambushed the guy in the dark

"You're not getting away Mr. helper"

"Tch, figures Snake would bring more help this time even if he's bailed"

"Oh...Snake wasn't the one who sent us, your actions were"

"Say what?!"

"Yep, you helping KID out has brought the three of us to the point of wanting to figure out who you are, now then..."

Furuya is the one who brings out the flashlight and shines it on the mysterious person and that's when the three of them receive the shock of their lives, an unaged Kuroba Kaito, granted he had changed his features somewhat, but they could still tell it was obviously him

"Ku...Kuroba Kaito?!"

"Who are you talking about, my name is Asakura Kenta"

"Sorry Kaito, but you're not fooling any of us, Amuro Toru aka Furuya Rei of the PSB"

"Akai Shuichi, currently believed dead and now going by the name Okiya Subaru of the FBI"

"Edogawa Conan, aka Kudo Shinichi, a detective"

"Okay so for some reason you three are giving me your real names, which is dangerous you know, after all what if I'm a criminal who will use what you just gave me to hurt you"

"I don't think so, after all you helped us take down the Black Organization in the future once you found out Snake was part of them, granted you had to get Snake off your back and no longer trying to snipe you first but still in the end you helped us with that disastrous raid that killed many of our comrades" (sighs) "but we succeeded in our mission at the end at least so that was some consolation, now then how are you here and unaged?"

"I'm telling you I'm not who you think I am"

All three of them sigh, look at each other and with a silent countdown say something at the same time which irrefutably proves his true identity, this is because back when the PSB and FBI were finally cooperating to take down the Organization and also had KID's help everyone realized that things could go wrong or at least for Bourbon someone would still need to be undercover and thus identified as a friendly, and with KID's penchant for disguises that was also important because they had discovered that he had disguised as a low level Organization member before which had almost gotten him shot by Camel and Kazami both at separate times and locations, as such they developed an automatic challenge/response code that worked both ways, either the one undercover could use the challenge/response to identify themselves or if an FBI or PSB agent suspected it was KID they could initiate the challenge/response, though it actually had been used by Furuya once during a raid because not everyone instantly recognized Bourbon or even knew he was undercover with the PSB, as such an FBI agent (who had been informed of the challenge/response code) was about to shoot Furuya once when Furuya gave the challenge code and the agent automatically gave the response and held their fire as did Furuya because unfortunately the agent looked a lot like an Organization member but there were differences that let Furuya give them a chance to respond correctly, as for the CIA they weren't involved at all by that point due to Kir having been ousted as a NOC finally and while she hadn't been killed she had been severely injured and was flown back to America for treatment once she was deemed stable enough for transport, the challenge/response code was carefully chosen too so as to keep it unique within the group but still have important meaning to everyone involved

"Crows lose"

"Stubbornness and creativity win"

As soon as they the person says that they immediately close their mouths and cover it briefly before the obvious drooping of shoulders saying that they surrendered, meanwhile the three smirk because they knew they had the KID right where they wanted him since everyone had worked on the challenge/response code every opportunity until it became an ingrained response because that was the only way to keep everyone safe when dealing with the Black Organization and undercover agents and magicians who were really good at disguises, with KID being KID it was Kudo who made sure that the challenge/response reaction was automatic by saying it at every heist, it confused a lot of people but it worked to ensure that if he ever disguised as an Organization member again he wouldn't get shot by his allies