Two Most Honorable Knights (1988)

When a princess found out the man she loved was in love with her maidservant and they were expecting a child, she murdered both of them after the maidservant delivered twins. She adopted one boy to continue her vengeance, while leaving the other to die. But the poor baby was saved and adopted by some so-called bad people. Years later these boys, one an elegant prince, another an hearty outlaw, met again, became friends and even rivals in love, lived adventures together, and one day found out the truth about their blood link and the death of their parents.