At This Rate, I’ll Die So the Villainess Decided to Become a Diva!Kono Mama da to Shinisou na no de, Akuyaku Reijou wa Utahime ni Naru Koto ni Shita , At This Rate, I'll Die So the Villainess Decided to Become a Diva!, このままだと死にそうなので、悪役令嬢は歌姫になることにした