Prologue~
"WHAT!?" shouted Conan. "ARE YOU SERIOUS!?"
"yes…" said ai calmly.
"BUT WHY!?" Shouted conan almost begging.
"Why don't you understand!? Its impossible! Because one of the main elements of the antidote is NOT grown anymore! It is grown from a plant and that plant's seeds are BANNED because of its effects! So, its IMPOSSIBLE to make an antidote now! Fine!?" shouted ai, now losing temper because of Conan.
Conan was depressed badly after this. He could not become Shinichi again. He could never be with Ran now. He swore to never to lie to himself but now he has to spend all his life lying to people. He could never… never… be alive in Shinichi's form again.
Next Day~
Conan stayed at Professor Agasa's house the night. After spending whole night thinking about it deeply, Conan decided now, that he would live a normal child life with ai, professor and his friends now. He would fact Shinichi's death in a bombing case. He would never… talk or think that he was Shinichi one time… he would forget about Shinichi. Forever.
He got up and told his plan to Ai and professor and they agreed. Professor Agasa called Inspector Megure and fake Shinichi's death. Megure was totally depressed but agreed and told all the news to everyone and they made a grave without any corpse in it. Ai and Conan told to other people and they all visited the grave.
It was a really sad time. Everyone was crying badly, especially Ran. Conan wanted to tell everyone, that, Shinichi was still alive, safe and sound. But, he couldn't. He couldn't reveal it and have Black Organization on all of their tails. He couldn't have so many innocent lives in danger. FBI's understood and did not tell anything to anyone. Everything was over now. Conan now just had to live a normal child life…. And forget about everything else. His parents also came. They told him that he could go with them and forget everything. Live a new life. But, he declined and said, 'even if I can never be Shinichi again, but still, I will stay here with everyone because… I would not want to hurt all these people here more… by leaving them all, for forever.' And they agreed.
Many days passed by. People started to recover a little now. Shinichi's death was something which hurt all of them deeply. Conan decided to live at Professor Agasa's house… he was afraid he would blurt something about his identity to ran, so, he chose to live there, even declining Ran's protest.
Now, he would live a new life. He would start again… and, will become a good successful person, once again. His new life begins… from here… Conan Edogawa will exist and live a life, from here.
Thank you YouthfulLily and Athie Lestrade