I am an only child, a little princess to my parents, and a baby to my grandparents. I have been going smoothly all the way, but I have been defeated by this system called "Good Sister".
As a sister, she must protect, teach, and raise sisters who have miserable endings in each world, and reverse their fate so that they can live a happy life.
Currently decided: Xiaobaihua's illegitimate daughter
Arrogant and domineering younger sister
naughty sister
Sisters of educated youth in the 1970s
Apocalyptic love brain sister
... There are still many settings, I will write them one by one slowly.
The main focus is on family relationships, and the male protagonist is more casual. After all, as a sister who controls the younger sister, of course the younger sister is the most important!