Dressed as a Male Protagonist, Why Does This Villain Have a System?

Gu Yuan accidentally traveled through time while staying up late reading a romance novel. When he woke up, he found that he had traveled through time and became the male protagonist of a harem-type novel. I have to change this one every day! Just when Gu Yuan was thinking this, he discovered that there seemed to be something different about the villain. What was he making in mid-air? What else is the system? A villain actually has a system! So how can this be played? The villain boss also came from time travel. He still has the system to fight, but he wants to beg for mercy from the villain but does not go around him and even wants to include him in the harem. This makes Gu Yuan have no choice but to keep his virginity. Even the system will show you, so he uses the halo of the male protagonist to fight wits and courage with the villain's system, and finally conquers the entire harem and lives a happy life. The villain was wiped out because he failed to complete the system task. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.