The Soft and Cuddly Little One Coasts to Victory in a Period Novel

Manni has an older brother in the army, but he'll die in the line of duty three years from now;

Manni also has an older brother at home, but he'll meet the female lead and ruin his life for her;

Manni also has an older sister who can't wait to get married, but she'll be beaten to death by her husband;

Manni even has a third older brother who's a bookworm, but he'll lose the use of his hands and feet and be disabled for the rest of his life;

Most, most, most importantly, Manni has a mother who transmigrated here!

As for Manni herself...