Detective Conan Magic File 2: Shinichi Kudo, The Case of the Mysterious Wall and the Black Lab (2008)

Shinichi Kudo is playing soccer in the park. While there, he sees a man who is trying to confirm his alibi for when his Grandmother was murdered, as he was drunk and passed out in the park at the time, but has no one that can verify his alibi, and he is the prime suspect. Shinichi decides to help. Due getting so concentrated in this case, Shinichi gets into a big fight with Ran Mouri, the longest fight they've ever been in. After Shinichi helps solve the case, both him and Ran and shown walking home from school, both wanting to end the fighting. They both see cherry blossom's, and hear someone sing "Amazing Grace", which ends the week long fight between the two. And Conan narrates how he didn't realize that song was going how this will help in a case 3 years later, in the Full Score of Fear case.