Train Heaven is a rather interesting place, being a heavenly rail yard and warehouse full of human waifu spirits of trains from all around the world, with elegant mansions surrounding it, each owned by one of the train waifus.

While you were strolling along, admiring the views, you spot two train waifus engaging in a rather 'friendly' rivalry; Union Pacific 4014 "Big Babe", a super-strong train girl from the United States and JR East Class E956 "ALFA-X", a super-speedy train girl from Japan.

ALFA-X: "Come on, slowpoke! You'll never beat me! You are no match for the fastest train girl this realm has to offer!"

Big Babe: "You think so, huh? While I might not be as fast as you are, I make up for it with unparalleled strength!"