Prompt 6: The Favor
This time it's not a scene… or well, not really one at least, just a discussion, which can be written by the author. But whatever! On to the idea:
Ran decided that she doesn't want to put her life on hold for Shinichi any longer, because in the two years he's already been gone she can count the times she met him on one hand and almost none of those meetings lasted longer than an hour. She tells Conan that she will start meeting other guys, but before that Ran wants to tell Shinichi personally about her feelings and her decisions. Conan is devastated, but thinks that Ran deserves happiness, even if it means forgoing his own. Unfortunately Haibara won't give him a temporary antidote, because of some reason. The only other way he can think of 'Shinichi' meeting Ran, is by asking KID to disguise as him. So, on the next heist he brings himself to ask KID for a favor – to help Shinichi – and gives KID the phone number of his older self. In the evening Conan anxiously waits in his room (at the manor or Agasa's house) for the call. When it rings Conan answers with his bowtie and tells KID about the conversation he was going to have with Ran, how Shinichi would answer and react. After Shinichi decides with Ran on which day they'll meet, KID takes a listening device with him so that 'Shinichi' can listen in on the conversation.
The conversation doesn't have to happen in the first chapter. What happens after that and how Conan or Shinichi ends up with Kaito, is up to the author. How exactly the phone call goes and what Shinichi tells KID can the author decide too (like why he can't meet her himself, why ask KID for help etc.), as long as he won't say that he's Conan (that should stay a secret for a while longer). And Ran can't figure out that the Shinichi she's meeting is in truth KID. I imagined KID as Shinichi and Ran meeting in a café (Poirot) and KID getting curious about the reasons as to why Shinichi couldn't meet her himself, but that's just an idea.