Looking for a story
 

Hi. I'm looking for a story which doesn't technically involve growth, but is still a GTS/amazon story. It's about a guy who drives through a tunnel, which, to his surprise, takes him to another world where all the women are giant. The first people he meets there are a women and her child. The woman mistakes him for a kid because he's the same size as her daughter. That's all I remember about it. If anyone has any information about this story, especially which website it's on, please tell me.