The plots usually involve the protagonist solving problems in the isekai world, which in turn brings him closer to the female characters. For instance, in many isekai harem light novels, the hero might have to defeat a powerful enemy, and during this process, he bonds with the female characters in his harem. These relationships then become an important part of the overall plot, with elements of romance, friendship and sometimes rivalry among the harem members.
They develop by having the protagonist gain power or status in the new world. This attracts female characters. In 'No Game No Life', Sora and Shiro enter a different world and their intelligence and unique abilities lead to them having a group of female followers. The plot also involves challenges and competitions that further the relationships in the harem.
Well, the isekai part sets the stage. It gives the opportunity for a fresh start and a new set of rules. In the case of 'Log Horizon', the characters are trapped in a game - like isekai world. Regarding the harem aspect, as the main characters interact with the world, they meet female characters. The story unfolds as they work together to survive and thrive in this new world. The relationships are complex, with different levels of friendship, loyalty, and sometimes love emerging among the characters, which drives the overall story development.
Typically, 'isekai gamer fanfic' start with the main character being transported to another world. Then, they use their gaming knowledge and skills to survive. For example, they might know how to level up fast or identify rare items. Next, they often face challenges like fighting monsters or dealing with political intrigue in the new world. As the story progresses, they grow in power and influence in that world.
Well, in most rebirth light novels, the plot develops around the concept of changing fate. The reborn character may decide to pursue a different career path or relationship. They might also use their knowledge of future events to gain advantages. Say, if they knew a certain business would be successful in the future, they could invest early in that. And often, there are also elements of romance added in, where the reborn character gets a chance to have a better love life compared to their previous life.
Often, they start with the protagonist's death or a tragic end in their previous life. Then, they are reborn with some sort of advantage, like knowledge or special abilities. For example, in many, the character remembers things from their past life and uses that to avoid mistakes or gain power.
In many reverse harem erotic novels, the plot progresses as the female character discovers more about each male's past and secrets. This leads to deeper emotional connections. At the same time, there could be some sort of overarching conflict, like a threat to the group or a mystery that they all need to solve together, which also affects the development of their relationships.
Often, they start with a character in a new or challenging situation, like being transported to a different world. Then, the need to build a city arises, either for survival or to achieve a certain goal. For example, in 'Release that Witch', the protagonist needs to build a city to protect the people from threats. As the city is being built, various problems come up, such as resource shortages, conflicts with other groups, or dealing with internal unrest. These issues drive the plot forward.
Well, in these 'jobless reincarnation light novels', often the plot begins with the main character being reborn in a strange new place. They usually start from a weak or disadvantaged position. As they explore the new world, they meet various characters that help or hinder them. They also try to find their place in this world, which might involve getting an education in magic or combat skills, like in many of these types of novels.
Often, they start with the introduction of the time - reset mechanic. For example, in 'Re:Zero', Subaru discovers that he can come back to life at a certain point every time he dies. Then, the plot develops as the character tries to use this ability to their advantage. They might first make mistakes in different loops, like Subaru initially making wrong decisions about who to trust. As the story progresses, they learn from their past attempts and try to change things for the better.
Often, they start by introducing the concept of a harem. For example, in some fanfictions, Naruto might suddenly find himself in a situation where multiple girls are interested in him. Then, the plot develops as he tries to understand his feelings for each of them and deal with the jealousy or competition among the girls.
They often start with the main character in a normal Minecraft situation, like starting a new world or joining a server. Then, through various interactions with other characters, the harem starts to form. For example, the character might save someone from a mob, and that person becomes interested in them.