Transmigrate into a Book: The Supporting Female Character Only Wants to Cling to the Male Lead

[Transmigrate into a book, devoted couple, happy ending] Transmigrated into a book? No problem. The first rule of surviving in another world: latch onto someone powerful! Latch onto the male lead? He killed my father. Forget it. Latch onto Dad? He can barely look after himself. Forget it. Latch onto the heroine? Looks like I’m doomed... ??? I transmigrated? Why isn’t the plot going the way I expected?