I tried my best to make this video interesting.
Another birthday cover! This one is a song by eny ft. Kasane Teto, known as『C』, or Chaos, or sometimes Chaos Marionette. It's a good song! All of the artwork in this video is directly based on stuff from the original PV, so go and check that out. :3

Original song by eny ft. Kasane Teto: sm11399125
UST is available here: http://www.mediafire.com/file/v124qhyj14l9dxw/C.zip/file
Anna's voicebanks are available here: http://tinyurl.com/VHUTAU