Unravel was written and performed by TK from Ling Tosite Sigure as the opening theme for the 2014 anime Tokyo Ghoul, where it became closely linked to Ken Kaneki's transformation. Stripped-down acoustic versions later spread across video platforms and soundboards, where creators used the softer arrangement for sad edits, tributes and reflective montages rather than high-energy AMVs. Its lasting appeal comes from that contrast: a song once tied to horror and action, slowed down until only its melancholy melody remains, making it instantly recognisable to anime fans.