Minimal song, minimal graphic, gret narration! As non japanese person it seems to me that there are so many referrals to theatre, music, "mithology" and so on. (plus almost one "easter egg"/signature around 3.52).
I do not know how but it is: the line for title/band is totally blank itself.The whole song is a kind of "experimentation", both music and video. The final result is not totally my taste but i like and i support the experimentation.