The Mystery Tour of Fire and Water: Aso Part

Conan, Ran, The Detective Boys, Haibara and Kogoro go on a trip to Mt. Aso. They meet a boy called Justin and his mother there. Justin shows them his stamp collection book, where he has stamps from all the tourist attractions at Mt Aso. They later part. While they are on a break, we see a man leaving behind a bag on a bench, and another man picks it up and leaves behind a stuff toy. Ayumi tries to return the toy but is pushed away by the man.