The official website for the anime Sekai Saikou no Ansatsusha has revealed information about its theme songs. Yui Ninomiya will perform the opening theme song, titled " Dark Seeks Light ," while Aira Yuuki will perform the ending theme song, titled " A Promise ."
Synopsis
The story follows an assassin who has been reincarnated in a fantasy world. Realizing this new possibility, he decides to use his knowledge from his past life and magical abilities to become the most uncontrollable assassin of all time.
Sekai Saikou no Ansatsusha will therefore premiere in October , after its previous premiere date in July was postponed.
Source: ANN