Saving the Female Side Character (Female-to-Male)

Announcement: [A 60% anti-piracy threshold. The story is complete, so read with confidence. Thanks, sweethearts, for supporting the official version.] Blurb 1, heroine: In her previous life, she schemed and plotted until the man she loved ascended the throne. But on their wedding day, she was rewarded with a cup of poisoned wine. Her family was slaughtered, and she died unavenged! Reborn, she is a wronged spirit crawling out of hell, living for revenge. But what's with the Sixth Prince, who always helps her in secret? Blurb 2, hero: Zhao Lin, a female intern, accidentally read a melodramatic historical romance that shattered her worldview. The heroine was a concubine's daughter, while the villainess was the legitimate daughter. The heroine's love interest, a prince, only pretended to care for the villainess to use her. In truth, he loved the innocent, delicate heroine. Zhao Lin skipped straight to the ending and saw the villainess used up and left to die a horrible death. Unable to accept it, she opened her eyes again and found herself transmigrated into the book, as the practically invisible Sixth Prince who was barely mentioned? In short, this is a story about someone who keeps helping until, without realizing when, they fall in love. Content warning: In her first life, the villainess didn't love the scumbag. She was only pretending. The hero and heroine are each other's first love. Any resemblance to other stories is purely coincidental. Though the hero transmigrates into a book, he doesn't know the villainess has been reborn. Most official titles, clothing, books, and other details in the story are borrowed from dynasties such as the Qin, Han, and Ming. They will be explained in detail below. This is alternate history, so please don't nitpick the historical details. Coming soon: The Cannon Fodder's True Heiress Is Saved (Female-to-Male Transmigration). Theme: True love exists in this world, but you have to keep your eyes open