: Theme singles can be found through retailers like Yumeya Club or on Apple Music .
: A version of "A Promise" is also sung by the character Dia (voiced by Reina Ueda). Background Score (OST) The World S Finest Assassin Music
: A fast-paced, high-tension J-pop track that mirrors the protagonist's cold efficiency and inner search for meaning. : Theme singles can be found through retailers
"Dark Seeks Light" from The World's Finest Assassin (English Cover) The World S Finest Assassin Music
: A more melodic and sentimental track, contrasting the darker tone of the opening.
and "For You" : Part of the core soundtrack ensemble.