Movie where teen friends walk on railroad tracks

After learning that a boy their age has been accidentally killed near their rural homes, four boys decide to go see the body. Gordie, Vern, Chris, and Teddy encounter a mean junk man and a marsh full of leeches, but they also learn more about one another and their very different home lives. Just a lark at first, the boys' adventure evolves into a defining event in their lives.

Sewashi and Doraemon find themselves way back in time and meet Nobita. It is up to Doraemon to take care of Nobita or else he will not return to the present.