Invincible Dragon: The Sisters' Protector

Tim comes down the mountain and goes back to Duskshire to look for his nine sisters. A strange old man carried him off when he was a boy and kept him eighteen years in training, and by the time he leaves he holds the title of Dragon King of the Dragon Court and has broken through in his art. The first sisters he finds are the eldest, who chairs a company, the eighth, who works at the security bureau, and the fourth, a doctor. He deals with a business crisis for one, a family plot around another and a threat to a third's life, with his fists and his medical training. One family's scheming and a ritual poison pull him into danger of his own. He brings other groups under his control as he goes and punishes the people who did wrong. Pieces of why he was taken as a child come out along the way. He meets the younger sister of a man called Dragon Eight. He also comes across the ninth sister, who has lost her memory.