Final answer:
Byang's happiness was initially linked to his prosperity and marriage, but it is his filial duties, such as mourning his father and caring for his true mother, that ultimately bring him a deeper sense of happiness and fulfillment.
Step-by-step explanation:
Byang's initiation into manhood and his various triumphs and trials form the narrative of his life. Despite achieving a position of power, uniting islands under his rule, and experiencing initial happiness and prosperity with his marriage, Byang's ultimate happiness does not seem to stem solely from this fulfillment of ambition and social standing. Family, especially the connection to his father and true mother, and his sense of duty appear deeply important to him.
His journey to mourn at his father's grave and the responsibilities he accepts thereafter suggest that filial piety and the resolution of familial duties are a significant source of fulfillment and happiness for him. After performing his filial duties, he returns to his home with a feeling of completion, caring for his true mother in their peaceful home, surrounded by loving children and their offspring.
Therefore, it is the balance of personal achievements with his commitment to his father's memory and his care for his mother that brings him the happiness he longed for, rather than his initiation into manhood alone.