The male protagonist died in his 40s and was reborn in high school. His mother was a killer and his father was a member of a big family. This question involved the plot and character setting of the novel. The specific answer needed to be determined according to the context and plot of the novel. However, generally speaking, the male protagonist was reborn into high school, his mother was a killer, and his father was a member of a big family. These plots were usually used to promote the development of the story or to describe the character's family background and personality traits. According to the context and plot of the novel, the possible answers were: - " Courage " Uncle: Father is from a big family. There is a " Yong " in his name. It might be because his father is an elder in the family or someone who has made important contributions, so he is called Yong. - Mr. Courage: My father was called Courage because he was a member of the family or because he had a higher status in the family or had made important contributions. - Mr. Courage: My father was called Courage because he was a member of the family or because he had a higher status or made important contributions in the family. The word "Courage" was part of his name. Of course, the specific answer still needed to be determined according to the context and plot of the novel.