As far as I heard, the original Dango song wasn’t really an arrange of Nagisa in the VN. And I personally liked the Dango song in the movie – it felt like it suited being a kids’ show song (well Dango Daikazoku is an in-story kid’s show) more than the Nagisa arrange. Though I understand that the Nagisa arrange had more reason to sound that way.
The movie soundtrack, while being decent for the most part, was used in an in-your-face manner so amazingly that everything came off as cheesy. Just watch the (movie ending) reunion with Ushio scene. Well the whole movie was very cheesy, but that’s another topic.
