Also, do you know if it's based on a fable? My Japanese is atrociously rusty, but after listening twice the story seemed to be allusive, referencing something that might have a classic folktale attached? The use of the masculine I isn't definitive, but... it could be referring to a male character and their secret adventure in another realm? Or am I way off?
@MLClark
Got me. There's a line about "an old story my grandmother told me", but I can't get anything like a plot out of it.