Album: 裏現 / Rigen
English translation will be published soon.
Artist: il cremonese
Singer: 初音ミク / Hatsune Miku
It opens with Miku's voice, singing lamentiously with a relaxed voice. Then the drums come in, and you get treated to some really heavy-sounding guitars.
The lyrics are not as deep as most other songs, but it does convey a clear story of losing someone and being unable to get them back.