Prompt 7: Deep Gratitude
I've seen stories where Shinichi knows KID and Kaito (without being found out), but rarely the other way around. I did write quite detailed, but it's not as much as it looks like. There are only around three short scenes:
At the takedown of the BO, the main building is burning and about to explode. Conan, desperate to get the APTX4869 for an antidote, is about to run in but gets stopped by KID. After convincing KID that whatever he needs is worth risking his life, KID rushes in instead and manages to get out with several slight burns and the apoptoxin. Conan is extremely thankful and at a heart to heart conversation, KID tells Conan about Pandora (which is for KID just as important as the APTX4869 is for Conan).
When Haibara manages to make the antidote, Conan 'leaves for America' and Shinichi returns after that. Shinichi wants to repay him and goes to talk with Sonoko, because she's rich and obsessed with KID. He tells her about a dublet jewel that turns red in the moonlight (leaving the mystical part out), one that KID will definitely come for. She goes traveling after that and finds Pandora, returning to Japan to make KID finally fall for her (or whatever her goal is, she's with Makoto after all). Shinichi writes a riddle just for KID and gives it to him on a heist. He also manages to convince Sonoko to ask KID to continue holding heists 'just for her' as payment. Kid goes to Sonoko's mansion secretly (so without a heist) and meets up with her, accepting the request. Together with the jewel he also receives a small note (given to Sonoko by Shinichi, written by 'Conan') in which Conan writes that this is his gift for his help on getting the apoptoxin.
Wanting to thank Conan, KID visits Shinichi to ask for a way to contact the little detective. Shinichi gives him Conan's phone number, not telling KID about his true identity. Conan and KID start texing after that and the detective convinces the thief to invite Shinichi to his heists.
What happens after that is up to the author and the scenes can be slightly different (rewritten), as long as the rough outline stays the same. How exactly they will fall in love is up to the author too, but I hope that Kaito won't figure out that Shinichi is Conan too soon. It sounds like something to laugh about when KID complains to Conan about Shinichi and he has to react without making KID suspicious. ^^
TAKEN OVER BY 'IZAYA_REIJY' CALLED "DEEP GRATITUDE" (on AO3)!