The World's Finest Assassin Gets Reincarnated in a Different World as an Aristocrat TV Anime Reveals Theme Songs

Yui Ninomiya, Aira Yūki perform themes for series premiering in October

source https://www.animenewsnetwork.com/news/2021-08-22/the-world-finest-assassin-gets-reincarnated-in-a-different-world-as-an-aristocrat-tv-anime-reveals-theme-songs/.176516