Disclaimer: Detective Conan is owned by the genius known as Gosho Aoyama and "Over My Head" is by The Fray.

This is going to be a ShinchiXRan story based on Over My Head since it fits them IMHO

He has been planning to take down the Black Organization after his first encounter with them back at Tropical Land
Everyone knows I'm in
Over my head
Over my head

The following day will decide if his crusade was worth it all. The FBI, Hattori, Ai, Agasa, and his parents are all supporting him. However, he needs to make a quick call to someone.
With eight seconds left in overtime

He dials a familiar number, waiting to hear her voice. "Moshi Moshi, Mouri Detective Agency" she said. "Ran, it's me" he said. "Shinichi" Ran whispers. "Yes Ran, it's me. I finally have a good lead on this case I've been working on. If all goes well I'll be home within the next two weeks" he tells her. "Shinichi, please hurry up and come home. I miss you" Ran says. "I miss you too, and if this fails, in my study there is a note for you to read. Ran, this may be the last time we talk, so it's about time I told you that I love you. More than anyone else in the world" he replies, praying this isn't the last time they speak. "I love you too Shinichi" Ran replies, with tears in her eyes. "I've gotta go Ran. Stay safe and I can't wait to see you again" he says as he ends the call.
She's on your mind
She's on your mind

'I maybe in over my head, but I want her to be protected from any fallout from the Crows' he thought to himself, ready to face the people who tried to end his life.