Transmigrate into a Book to Save the Gloomy Villain

[This is an early work. The writing isn't great, and the plot is messy. Don't read it. You've been warned. If you insist on reading and then leave a one-star review insulting me, I'll delete your review and mute you, guys.] Jiang Cha transmigrated into a book, becoming the vicious female side character who hit the villain with her car, fled the scene, and was eventually tortured to death by him. When Jiang Cha arrived, she found herself behind the wheel, with a teenage boy standing not far away… Xiao Yu was reborn, returning to the beginning of the disaster that had marked his previous life. Just as he was about to dodge the luxury car, it suddenly swerved the other way and slammed into a wall. Through the night, Xiao Yu saw the unconscious person in the driver's seat… A wonderfully sweet romance, with no male side character who insists on marrying the heroine and no female side character who keeps meddling. Both leads are each other's first and only.