Borrowing Spring Light from Snow and Frost

With a marquis for a father and a duke for a grandfather, life has gone smoothly for eighteen years. Then one day, turmoil strikes. Am I doomed to be the supporting female character? I'll become a female official, find myself a handsome man, and make money, because that's the proper thing to do. Even a supporting character can live like the heroine!

The heroine is an ordinary person who was born into this world. She has no peerless beauty, no golden finger, no evil stepmother or mistress, and a harmonious family that works together to build a comfortable life.