When I Made My Older Brother Play the Villainess, He Became an Unexpectedly Beautiful Woman (Man) Who Could Topple a Nation

Oh no, if I keep going like this, I'll become a pawn of a demon-worshipping family and meet my doom. Convinced of this, I decided to prevent my own destruction by switching positions with my twin brother and working behind the scenes. However. When I had my twin brother play the role of the villainess lady, he somehow became a stunningly beautiful woman (man) who could topple a nation. *Please note: This is a repost of a work that was previously posted individually by Megumi Enoshima, a member of our circle, on "Kakuyomu."