Synopsis: Gambangeseo Namjajuingongeul Mannatseumnida

Upon awakening, I made a startling discovery - I had been imprisoned. However, there was a twist - I had become trapped in a mature-rated romance novel as the younger sibling of the primary antagonist. Adding insult to injury, I found myself incarcerated in Kambrakam Jail due to my sibling's misdeeds. To make matters worse, I was compelled to share quarters with the infamous Henrich Doran von Hel, known for his cursed reputation and transforming into a ferocious beast. As per the original script, Hel was slated to engage in a passionate liaison with the story's heroine while in prison. But my unexpected appearance threw the story off track. Now, I must steel myself for the convoluted consequences of a love triangle involving the book's ultimate villain and its leading man!