Kudo Becomes Conan and Moves in with Ran

Kudo makes his way home and encounters his neighbor Dr.Hiroshi Agasa (An inventor/Scientist). He convinces him that he really is Kudo Shinichi who was made small by some poison given to him by some men in black. He decides that he must try to get his hands on that poison so that Agasa can make an antidote. But, Agasa tells Kudo that he must keep his identity a secret so because if those men find out that Kudo is still alive his life, and the lives of those around him could be in danger.

At that point Ran shows up looking for Kudo because she was worried about him, and hasn't been able to get a hold of him. Conan quickly puts on a pair of his dad's old glasses as a disguise and when Ran asks his name he creates Edogawa Conan (from mystery authors Edogawa Ranpo, and Arthur Conan Doyle).

Since it might be suspicious if he is always coming and going from Kudo's house right after he supposedly dies, and since Ran's dad is a private detective and he might be able to use that to get more information on the whereabouts of the men in black, Kudo decides to stay with Ran. Agasa tells her that Conan's parents were in an accident and are in the hospital so he was taking care of him but he lives alone and is very busy, so Ran agrees to take Conan with her.

On their walk home, Ran reveals that she really likes Kudo. Immediately after that is when Conan get's involved with his first case with Ran's dad Mouri Kogoro.

Three days pass and Ran is concerned at Kudo's absence from school, but Agasa convinces her that he is just involved with some complicated case and will return soon. Also Agasa develops a voice changer disguised as a bow tie for Kudo to use on his cases.

However, Kogoro isn't a very good detective and doesn't get many cases, so Agasa tells Kudo he needs to work hard behind the scenes to make Kogoro look like a great detective to get more cases so that he has a better chance of finding the men in black.

In the next case, Kudo makes use of the bow tie by knocking out Kogoro and using his voice to reveal his deductions as Kogoro himself. Kogoro, being kind of foolish, and despite not remembering anything, goes along with the praise for his great deductions after he wakes up.

That night, Conan uses the bow tie to call Ran with Kudo's voice and tells her not to worry. That he got pulled into a difficult case and will be back after he solves it.