Well, I watched it about 4 months ago, but can't actually recall much about it. Obviously there was some music in there, but not presented in such a way to leave any strong impact, at least for me. I think there was a lot of focus on them moving from place to place and moving around the places they were in once they got there, with voice-over narrative in Japanese talking about some of their experiences.
That's why I thought it was a bit dull; perhaps not particularly memorable is a better way to put it. Still, others might get more out of it than me.
