Contrast between strong and weak (in the early stage, the school bully sister × the weak sister, in the later stage, the younger sister grows up and counterattacks)
Yu Muyang is the aloof eldest daughter of the Yu family, proud and sharp, like a burning flame. Yu Sheng is her half-sister, an unrecognized "illegitimate daughter", quiet and forbearing, like a piece of melting snow.
Purpose: True family affection and love never require blood endorsement, but the courage of two souls to recognize each other and redeem each other in trauma.