Villain: the Protagonist's System Is Cut Off at the Beginning

In other words, I am forced to be a villain. Am I not a positive character with a system? The heroine was originally my fiancée Su Jin accidentally traveled through a street fighting novel that she had read, and became the villain in it that everyone wanted to beat up. How could this happen? Just when Su Jin was at a loss what to do, the sound of system activation suddenly came from his mind. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.