Bound to the Good Fortune System, My Mad Father Begs Me to Cuddle Him

[Transmigrates into a three-year-old cannon-fodder girl in an enemy kingdom + unhinged tyrant dad + Fortune System + adored by the whole dynasty + groveling arc] One day, Lin Ruan wakes up after transmigrating into a book. She's become a pitiful three-year-old, abandoned in the cold palace to await her death. The first thing she sees is a wicked prince who wants to strangle her. Where's the System? Where's her golden finger?! [Ding! SSS-level hostility detected! The Fortune and Misfortune System has activated! The harsher they hurt you, the stronger your good fortune!] He tries to strangle her? The prince immediately spits blood the next second! Urgent report from the Imperial Observatory: Anyone who harms the young princess will be punished by Heaven! She thinks she's made it through this ordeal, but then a thunderous crash shakes the sky! Her unhinged father makes a grand entrance! Unparalleled looks, a powerful presence, and completely insane?! Lin Ruan: ...Does this dad have something seriously wrong with him?! To survive, she wields the Fortune System in one hand and her adorable toddler act in the other. Poisoned food? She counteracts it by exchanging for a hundredfold increase in bitterness, making the mastermind gag up bile. A frame-up? One Truth Talisman, and the scum expose themselves on the spot! Cold shoulder? She puts on a whole show of obedience and tearful pleas. The Seventh Prince feeds her, the Imperial Observatory reads her fortune, and even the stern old eunuch secretly slips her a bun. Watching her Fortune Points shoot up, she couldn't be happier. Later, in court, he draws his sword in front of everyone to protect her: “Who dares lay a hand on my Ruanruan?!” The tyrant of old goes mad for her, begs her, and smashes down wall after wall for her!