Mu Ancheng, the second young master of the Mu family, always thought that he was an only child, until one day an older brother, Mu Si Nian, appeared out of nowhere. Later, he overheard the conversations of the servants and learned about his brother's secret. Originally, he just wanted to take good care of his brother, but I don't know when the relationship turned sour.
Concept: Orthopedic love is risky