An official website opened today revealed that a TV anime adaptation of Satsuki Nakamura and Kana Yuki’s Though I Am an Inept Villainess: Tale of the Butterfly-Rat Body Swap in the Maiden Court light novels is currently in production at studio Doga Kobo (Oshi no Ko).
Mitsue Yamazaki (ZENSHU) directs the historical drama series, with Yoshiko Nakamura (Sleepy Princess in the Demon Castle) in charge of series composition and Ai Kikuchi (Shikimori’s Not Just a Cutie) providing character designs.
The announcement was teased last week by The Apothecary Diaries producer TOHO Animation. Further details, such as cast and release date, were not confirmed at the time of reporting.
Though I Am an Inept Villainess: Tale of the Butterfly-Rat Body Swap in the Maiden Court Reveal Video
Though I Am an Inept Villainess: Tale of the Butterfly-Rat Body Swap in the Maiden Court Teaser Visual

Seven Seas Entertainment publishes an official English version of the light novels and Ei Ohtsuji’s manga adaptation, describing the story like so:
In the Kingdom of Ei, five clans put forth their maidens as imperial consorts—but only one will be crowned empress. Just when frail and beautiful “court butterfly” Kou Reirin seems poised to marry the crown prince, jealous “court rat” Shu Keigetsu steals her body! Reirin wakes up in the dungeons as the conspirator, and things look dire…or do they? Now that she’s got a robust new body, not even the looming threat of execution can stop her!
Source: Comic Natalie