Question: the man who inherits the dragon manga?
Answer: Eighteen-year-old Ryusei falls out with his stepdad when his mother dies and decides to track down his birth father - a super dangerous guy known as the laughing dragon, Kiryu Miyazawa. In the sixth volume of Tough: The Man Who Inherits The Dragon, Ryusei is taken in by his uncle, Kiichi Miyazawa.