Unravel was released in 2014 as the opening theme for Tokyo Ghoul, the anime adaptation of Sui Ishida's manga about Kaneki, a student turned half-ghoul. Written and performed by TK, the solo project of Ling Tosite Sigure's vocalist, the song became inseparable from the series and its themes of identity and suffering. Clips of its opening notes spread widely through AMVs, edits and social media, and it remains one of the most recognised anime openings, instantly evoking the show's dark, tragic tone for fans worldwide.