My Stepsisters Spoiled Me into a Legend

Cedric White gave his first life to his sisters. He drilled them in arms, saw them through their studies and opened up trade for them. On the day he came first in the imperial examination, his mother and his sisters turned on him and he died at their hands. The rank went to his younger brother. He comes back to the day his parents separate. He leaves his mother and sisters and goes with his father, who marries into the Moore family. Three Moore sisters take him in there and compete over who gets to look after him, and they call him the treasure of the house. With him in it, the Moore family starts winning and bringing in money.