悪役令嬢に転生したら敵国密偵に求婚されました！？

Synopsis

(from Mangaupdates) "Do you have any regrets about your life?" The reincarnated villainess Amneris has been condemned and her engagement has been broken off by the Crown Prince! With no chance of winning against the heroine, she plans to leave her scenario, but for some reason the situation is worse than the original. She was only supposed to get expelled from the royal capital, but instead she is thrown into prison. Life in a different world that begins in prison?! That's just so unfair! Unexpectedly, the enemy country's spy Berenice Amor reaches out a helping hand! Moreover, what was proposed as a condition to help is――?! What is the goal of the mysterious enemy spy? What will become of Amneris? A romance fantasy with different social status unfolds in a different world full of conspiracies!