The Seventh Prince Wants to Bail

At the end of a grueling day, a sudden pain struck—and I found myself transmigrated into the fantasy novel "Dark Header!" But out of all people... I became the depraved Seventh Prince, doomed to be miserably executed three years later?! From this point on, there's only one goal: lie low until the original protagonist appears, and then quietly escape the empire. However, the events of the original story began unfolding far earlier than expected. As I move between the imperial palace and the slums... a covert effort to contain the fallout begins.