I just heard the original song Mashou Shojou which Michiru covered. I think I prefer Michiru's cover more than the original. The original has some really dissonant parts, although it has cute Japanese girls, and has a weird music video.
Cover
https://www.youtube.com/watch?v=WJZowCP3jpIOriginal
https://www.youtube.com/watch?v=HvScug2tmfAThe original is from a group called Phantom Shiita, or is it Theta? Who knows.
