Eternal life meant that a person could never die and had unlimited life. Doujinshi referred to the re-creation of a fictional world and characters to form their own unique storyline and character. Some immortal doujinshi novels might describe how the protagonist obtained the ability to live forever through some method and then began various adventures and explorations in this infinite time. These novels might have different storylines, such as how the protagonist would face the challenges and limitations of immortality and how to establish connections and relationships with the various characters in the eternal world. There are also some immortal doujinshi novels that place the protagonist in a fictional world related to immortality, such as an ancient kingdom or myth related to immortality. In these novels, the protagonists might experience various adventures and challenges related to immortality, and they might also explore various mysteries and secrets of the eternal world. Eternal Doujinshi is an imaginative and creative art form that uses fictional worldviews and characters to tell all kinds of interesting storylines and personalities.