This is not a continuation, it's a different way everything could have gone. When I thought of my story I wondered what would happen if they didn't get rid of the non aging effect so I thought up something like this. This is just for fun, hope you enjoy!

"We might stop aging once we return to our original ages."

Conan had understood the meaning of the words Haibara had said but hadn't really understood the implications for a long time.

He, along with the FBI, CIA, PSB and several other government bodies destroyed the organization and it's buildings.

Completely.

All information on the APTX had been burned away in the explosion the occurred during the final confrontation. It was a bit morbidly funny how, in the end, it wasn't really Conan's win. He lost the very thing he was risking his life for to the organization. They still won in the end.

Unfortunately Mary was killed by an organization's sniper, both he and Haibara had started growing older together. At first it wasn't a big deal, the organization wasn't around so they had nothing to fear looking like Kudo Shinichi and Miyano Shiho.

Ran had grown up, got a job and married without Kudo Shinichi. She had moved on with her life and was happy, everyone was. Conan was a bit upset with how everything turned out but he matured and accepted the outcome of their love as a childhood crush- nothing more.

Then Conan and Haibara noticed that for the last month they had stopped aging. They always knew it was coming, they just hadn't expected it to happen so quickly. No one else noticed, Conan and Haibara only noticed because their hair had stopped growing, but soon other people would.

People would notice two high school students who had suddenly stopped aging one day and people would become curious.

It was like Hattori said, humans are jealous and suspicious creatures. If they see something perfect they want to find a flaw.

Experimentation. While it was unlikely it was completely possible. They had to leave.

It was hard explaining their excuse to the detective boys but their parents finally wanting them back worked fine. For a while Conan and Haibara lived with the Kudo couple as Conan started also writing mystery novels, becoming Yusaku's successor.

He kept his identity hidden, of course. Not going to any of the parties the Kudo couple went to but becoming something resembling a ghost writer. He would never let anyone know who was writing those books but would continue to send them to the publishers all the same.

Haibara, meanwhile, continued the professor's work of creating inventions, putting her knowledge of chemistry to good use. Likewise, she kept her identity hidden but became a huge influence on the industry.

The two of them spent some time living in apartments, changing about every two years to keep anyone from becoming too curious. They joined online college courses and expanded their already great amounts of knowledge.

It was efficient, it was secretive, but most of all it was lonely. Anyone who they got too close to would notice their lack of aging sooner than casual acquaintances. Their lack of aging caused their immune system to stay as strong as a normal teenagers, they would not die of old age. Anytime they went outside they were always worried they would see someone they used to know.

Conan wasn't sure what they would do in that sort of situation. They might become scared and run away or start crying at the sight of them or not even recognize them. They stayed the same but everyone else they knew had grown old. Who was to say they wouldn't just walk past each other without noticing.

It also didn't help that Conan's unnatural ability to attract corpses had only grown with each year he was alive. While it gave him detective work to use for his stories and exercise his brain it did make staying under the radar much harder than it would otherwise be.

His refusal to let a case go unsolved didn't help either.

"Bye Haibara. I'll see you later." Conan called as he left the door of their shared apartment. They had spent years together and had become something like siblings. Akai was the person who cared about protecting her the most but Conan knew they couldn't stay together.

When he and Haibara left he made sure to not let Akai know beforehand and to leave only a note of what they were doing and why. Akai was strong and smart but he would age. Unlike them he couldn't last forever, always switching homes and forming no permanent relationships. So to make sure he and everyone else could keep their lives Conan and Haibara had left without saying anything.

Conan walked the street on the way to get dinner from one of the department stores nearby. He tended to avoid large crowds so he was surprised when he suddenly felt someone crash into him.

"Ow!" he heard from behind him and as he turned around he saw a girl around his physical age getting up. She reminded him of someone though he wasn't completely sure who.

"Sorry, I just bumped into someone! I'll be right there, I promise." It took Conan a second to realize she was talking to someone through a soutra. A new piece of technology that worked similarly to telepathy through a computer chip installed in your brain. Despite it not being a requirement many people found it easiest to actually speak the words during those conversations.

"Are you alright?" The girl looked up as she heard him speak and blushed, taking the hand held out to her and standing up.

"Y-yes. I'm sorry but I need to get to Maho street immediately."

"That's a long way from here, do you have a hoverboard?" Hoverboards, ironically enough, were developed by Haibara and the professor after they went on a quest to improve his skateboard.

"No but my grandmother is sick, I need to hurry."

"I'll take you." Conan said as he pulled his board out and jumped on it, motioning for her to join him.

They zoomed along the road with skill generated through decades of practicing with the same body. Making sure the girl behind him was holding tight Conan increased the speed of his hoverboard and did several jumps over various fences to save on time.

Once they landed next to the hospital the girl was waiting for she dashed inside, not paying attention to the fact that she was still holding onto Conan.

Paying no attention to the noise she was making the girl hurriedly opened the hospital door and walked inside, only stopping when she heard a voice.

"Could you please let me go now?"

The girl gave a slight jump when she realized she had just dragged the boy who brought her to the hospital room.

"Sil, who is this boy?" A woman asked from across the room as she walked closer.

"Mom, sorry. I bumped into him and he drove me here so I could come faster."

The woman gave a boy of apology and gratitude to Conan then looked him in the eye.

"If you don't have anything to do please stay here. I'd like to get you something to show our appreciation for this."

"You don't have to-"

"I insist. Would you mind joining us for dinner?"

Conan paused for a moment then texted Haibara about what had just happened.

'You can never stop helping people, huh Meitantei.'

'Can I stay?'

'I feel like your caretaker… sure, you can stay. Enjoy yourself.'

"I would love to stay if you wouldn't mind."

Sil, as she had been called, lighted up at that and smiled. "I'm going to go see grandmother, I'll meet you at dinner.

The dinner was pleasant with Sil being extremely sociable with everyone she met. As Conan was about to leave she stopped him.

"Do you want to meet my grandmother?"

"A-are you sure."

She gave a nod in return. "I think she would be happy meeting someone who helped me."

"Then I would be honored."

Both 'teenagers' were about to enter the room when Sil's mom called her from across the hallway to help with something.

"Ah, sorry. I promise I'll be right back!" She exclaimed with a large bow as she ran to help her mom with whatever they were doing.

Conan smiled as he was once again reminded of a certain person. A person who was always ready to help others but was always energetic about it. He just couldn't remember who that was.

He entered the room and saw an old woman laying down on the bed in front of him. Despite her age she was also full of a strange sense of youthful energy.

As Conan walked closer he saw a face that he instantly recognized despite how it had changed. In his surprise he let out her name in a hushed whisper.

"Ran."

The woman opened her eyes and looked over to him, "Shinichi? I see, so you've come to help me move on with you."

A hand reached up and Conan gently grabbed it.

"I don't deserve such a warm greeting… after always leaving you so suddenly. I promised I would come back to you but to save you I got rid of that possibility."

"Shinichi?"

"I'm so, so sorry."

"You're never crying Shinichi." Her words made him notice the tears streaking down his cheeks. "Don't worry so much, this isn't you. You always light up the whole room with your intelligence and charisma, your a prince."

"I was a naive boy who thought he could save everyone."

"I don't care. You were you. A young king who could do anything he wanted to. I will be joining you eventually, nothing will ever change that. So don't cry about me having to grow up without you, I'm happy with how I lived my life. You saved so many lives and arrested so many people doing the wrong thing. You should feel the same."

"Thank you Ran."

"It's not a problem. I've always been like a mom to you so I'll leave you with one last bit of wisdom. You've given up so much for everyone else, if anyone deserves happiness it's you."

The door suddenly opened with Sil joining them and Conan made a silent exit out of the hospital.

"Thank you for everything Ran. Rest in peace."

End of Story