The Transmigrate-Into-a-Book System: The Supporting Actress Wins Over the Scheming Prince

[System + His Only Love + Together Forever, Just the Two of Us + Devoted to Each Other + 1v1] She is a bold, free-spirited game developer who loves fiercely and hates fiercely. One day, she transmigrates into a book as a cannon-fodder supporting character. He is a prince living in temporary retreat in a small mountain village, handsome and elegant, cold as ice yet fiercely tender. She takes on the worst sorts, tears apart a scheming white lotus who is good at putting on an act, builds a prosperous life, and takes the occasional chance to flirt with that cold, devious man.

Later, they stand shoulder to shoulder. Using her golden finger, she helps him reclaim his empire, only for a declaration of war from a neighboring kingdom to arrive. She joins him on the battlefield, where they slay countless enemies and put an end to the chaos. Every step is arduous, but their love grows stronger all the while. What will await them after that?