The Terminally Ill Prince is the Mad Dog of the Underworld (Novel)

When the Terminally Ill Noble Allenbert woke up from his fever, he realized that he was the reincarnation of Karzan, the mad dog who roamed the underworld. ...But something about this place doesn't feel right. "Allenbert, nobles need secrets and darkness." The sinister and chilling schemes of his brother, like a snake, are suffocating him from all sides. "You've been causing quite a stir lately." The powerful and authoritative eyes and ears of the head of the family are hidden everywhere, watching him. "...When will I see Mother?" Meeting his mother, who has secluded herself due to a mental illness, seems impossible. "But it's okay." Karzan failed, but Allenbert's journey is just beginning. "Two lives, two revenges." There's no mercy. I'll pay back with interest, and make sure it's done properly.