She's Only Three, What's With This Villainess System?

[No CP + System Arrives 15 Years Early + Little Lucky Star Gets Pampered + Lighthearted] Jin Lanyue, the beloved treasure of the Northern Marquis' household, binds with a system claiming to be for a villainess. "Today is your 18th birthday. Now abandoned by all, you decide to destroy everyone!" Jin Lanyue stares blankly at her chubby little hand still clutching a half-eaten pastry.

But... she's only three years old! The confused little dumpling starts following the system's "bad deeds." The system tells her to poison her family. Jin Lanyue bites her fingers, realizes she doesn't know poison, and cleverly sprinkles lots of seasoning instead.

Mom: "Aww, my precious is so filial, cooking for us at such a young age!" The system tells her to steal money. Jin Lanyue "steals" the allowance Dad prepared for her in advance to buy snacks for everyone.

Dad: "My daughter is so thoughtful and generous!" The system tells her to take the prince's beloved possession. Jin Lanyue smartly adopts his puppy. When the furious prince comes looking, he finds the skinny dog has become a chunky coal briquette.

Prince: "Sorry I misunderstood you - you're really kind!" Jin Lanyue tilts her head, wondering why these "bad deeds" keep turning out good. Later, when the original story's female lead dramatically reincarnates, determined to crush this snot-nosed kid, something feels wrong.

The OG FL: "Why is everyone on her side?!"