After Becoming a Spare Tire, I Was Targeted by the Villain and the Male Lead at the Same Time

Xu Chenghao accidentally transmigrated in a book and became the lifetime spare tire of the Mary Sue female lead.
What’s more frustrating, he transmigrated at the time when the spare tire and the villain confronted each other and it’s a fight right away.
What’s even more frustrating, according to the plot, after the spare tire saves the female lead from the villain, she’ll throw herself into the arms of the male lead, and wail in the next second.
When the time comes, he is abandoned by the female lead, the male is wary of the villain and hates him. He will die very miserably.
Xu Chenghao: “… Come, come, come, please take away your female lead!”
Female lead: “??? Say you love me for the rest of your life and never let me go?”
Xu Chenghao: “I’m sorry, I like men.”
Female lead: “…”
One month later，
The villain and the male lead rushed to his field at the same time and asked, “I heard that you like men?”
Xu Chenghao: “…”
He looked at the two men in front of him and said, “I’m sorry, I only have farming in my heart.”
The two: “…”