The opening of Tokyo Ghoul encompasses the struggle Ken Kaneki faces as his life quite literally 'unravels' around him in the face of his transformation.
TK, the guitarist and vocalist is perhaps most well known for Tokyo Ghoul's Unravel, but the band itself is also known for providing opening themes for both seasons of Psycho-Pass as well as the movie. Ling Tosite Sigure is an indie mathrock band from Saitama, Japan. Along with the typical synthesizer, drums, guitar, and bass, this song also makes use of violin, adding to the dark tone. The opening of Tokyo Ghoul, Unravel by TK from Ling Tosite Sigure, is a emotional J-rock song that ranks on MAL's list of best opening songs of all time.
The Opening Song: Unravel by TK from Ling Tosite Sigure