After Becoming the Cannon Fodder Supporting Female Character in a Period Novel, the Female Lead Panicked

Chu Yun transmigrates into a period novel and becomes the older sister of a cannon-fodder character. In the story, her cannon-fodder younger brother drowns while trying to save the heroine from drowning. The original heroine is reborn and goes on to live a prosperous life, with everything going her way and all the glory she could want.

Now Su Wangyun, she lives in an era of scarce food and clothing, poverty, chaos, and squalor. She knows only a little amateur medicine and nothing else. She has a pair of younger twin siblings to support, while her cannon-fodder younger brother is stubborn, rebellious, and immature. She has to be both father and mother, raise the six-year-old twins who still depend on her for everything, and set her wayward brother straight...

Fortunately, she has a Merit System. She can earn merits by practicing medicine and exchange them for food, supporting her family and teaching her siblings.

That man who wears a smile all day, grinning with narrowed eyes, and has run into her calmly saving people time and again seems easygoing. Yet there is a chilly air about him, and it looks like he has set his sights on her...