Good news for Ming Zaixian: she got into Peking University.
Bad news: her admission letter had barely arrived when she transmigrated.
Worse news: she'd become the young mistress of Baihe Star Palace, beautiful, high-ranking, and doted on by everyone, yet unable to use magic, with no cultivation at all, and born with a hundredfold sensitivity to pain.
System: This world is doomed to be destroyed, and the only person who can save it is the Second Prince, Yin Hanzhu, whom everyone looks down on.
Her mission is simple: protect him.
More precisely, she has to take the beatings meant for him and suffer the injuries meant for him.
At least the System isn't completely heartless. Every time she takes a key injury, she gets "damage compensation": the more severe the injury, the greater the reward. She can exchange it for cultivation, a stronger constitution, life-saving trump cards, and even a rewrite of her fate.
The one thing she can't avoid is the pain.
Ming Zaixian's vision went black.
Then the System told her one more thing:
Yin Hanzhu had just killed the original owner of this body with his own hands.
And before she died, the original owner had stepped on Yin Hanzhu's face in front of countless people.
Ming Zaixian: "..." So she's been made into a human shield for her enemy!
Later, after enduring pain all the way, Ming Zaixian really did protect that gloomy, ruthless boy, whom anyone could bully, until he became someone none of the Four Realms dared provoke.
Mission complete, reward in hand, and the male lead's lifelong happiness all arranged.
Ming Zaixian happily packed her things and prepared to go home.
But just as she turned around, someone grabbed her sleeve.
She looked back.
The man, now so powerful that no one dared look him in the eye, stared at her with red-rimmed eyes and said nothing.
Ming Zaixian: "...Why are you tugging on me?"
Yin Hanzhu's fingers tightened.
"Didn't you say you'd always protect me?"