Villain's Cleansing: the Heroine Regrets Endlessly

Long Yuanzhao traveled through a novel and finally became a big villain according to the requirements of the system. Just when the novel came to the finale and he, the villain, was defeated, the system suddenly cleared him and became a big hero! Long Yuanzhao thought about how to clean this up, but fortunately, the system of conscience gave him a golden finger that could modify the previous plot.