감방에서 남자주인공을 만났습니다

Synopsis

One day, I opened my eyes and found myself in… prison?! That's right - out of all the characters I could've reincarnated into, I woke up inside a 19+ rated romance novel as the villain's younger sister. As if that wasn't enough, I was locked up in the infamous Kambrakam Prison for my brother's crimes. Deep within the very same prison lies Heinrich Dorian Von Hel, the male lead, who's rumoured to be suffering from a curse that turns him into a beast. Though he was supposed to meet the female lead and spend an *interesting* night with her right here in Kambrakam, my existence has completely changed the original plot! What kind of future lies in store for me now that I've gotten myself tangled up between the novel's greatest villain and its protagonist?!