: A version of "A Promise" is also sung by the character Dia (voiced by Reina Ueda). Background Score (OST)
: Included in the single Dark seeks light / Sanbunteki LIFE released by the Lantis label. Ending (ED): "A Promise" Artist : Performed by Aira Yūki . The World S Finest Assassin Music
and "Reincarnated Beat" : Instrumental pieces used during critical transition scenes. "Time with Dia" : A softer, character-focused theme. : A version of "A Promise" is also
: A fast-paced, high-tension J-pop track that mirrors the protagonist's cold efficiency and inner search for meaning. and "Reincarnated Beat" : Instrumental pieces used during
The music for The World's Finest Assassin Gets Reincarnated in Another World as an Aristocrat is characterized by its high-energy opening and emotive ending themes. Composed by , the soundtrack supports the show's transition from dark assassination missions to life as a noble. Core Theme Songs