Mythology is considered to be the original form of storytelling, and mythological stories are of great value in automatic story generation. However, unlike myths, which have a simple and basic narrative structure, modern narratives are considered to have a complex structure. In this paper, we compare the structure of mythological stories with that of modern stories based on myths, and discuss how to generate stories from the original. As a result of the analysis, it is clear that there is a different structure between the behavior of the protagonist of the mythical story and that of the protagonist of the modern story.