Villain: the Plot Is Reversed, the Heroine Begs Me for Forgiveness

Lu Changsheng traveled back in time to the novel "Eternal Immortal Emperor", and he turned out to be the biggest villain in the book! His master, his wife, who regarded him as his own, the divine couple of the Kyushu Continent, finally met an infamous end. Exploring a secret realm for my most beloved apprentice, he was picked up by the protagonist when he narrowly escaped death. The apprentice directly pledged himself to him, and was extremely disgusted with his master. His senior sister, who had always been kind to him, misunderstood him and harmed his sister. She destroyed his golden elixir and cut off his path. Now that I have arrived with the power of the system, I must change my fate and leave my own legend in the Kyushu Continent.