This song...I don't know why, but this song almost makes me want to cry every time I hear it. But I feel this way about most P-Model/Hirasawa songs that fall into the "Weird Sort-of Love Songs...IN SPACE!" category. (Yes, that is a legitimate category for me.)
The following song, "Enola," is from the 1997 P-Model album Electronic Tragedy/~ENOLA. ( It was also used later for other things. ) How you might connect the song to the Enola Gay of atomic bombing infamy is another story.