Dressed as the Hero's Younger Brother, I Conquered the Villain

An ordinary college student dressed up as a young master from a wealthy family and was the younger brother of the hero. The unexpected traffic accident allowed Lin Gu to start another life. When he woke up, he became an autistic young man who lived in his room all day, and was actually bound to a system. The system told him, "You have become a cannon fodder male supporting character. Next, you will fall in love with the heroine and conquer her." So, he succeeded in his strategy against the villain. When he accepted the failure, which led to the NPC ending, he returned to the system panel, but the words "Reverse Strategy Successful" appeared. What exactly went wrong? Intention: Break away from the shackles of the plot and be the person you want to be