Well, in 'evil Sadao Maou x reader fanfic', a frequent theme is the struggle between good and evil within the relationship. The reader may be a force for good trying to change Maou's evil ways. Also, themes of loyalty and betrayal can be present. Maou's actions as an 'evil' character might lead to situations where the reader has to decide whether to stay loyal or turn away. And sometimes, there's the theme of forbidden love, as being associated with an 'evil' character like Maou can be seen as something taboo in the story's context.
One common theme is the intense and often obsessive love of Sadao Maou towards the reader. This can lead to possessive behavior.
Common themes often include trust. Given Maou's dark side, it takes time for the reader to trust him and vice versa. There's also the theme of discovery. The reader gets to discover the different layers of Maou's personality. For example, beneath his dark exterior, there could be a more vulnerable side. And the theme of sacrifice might be present. Maou might have to sacrifice some of his dark desires or power for the sake of the relationship with the reader, or the reader might sacrifice something for Maou.
The theme of redemption also pops up often. Sadao Maou may be seen as a 'bad' character initially, but through his relationship with the OC, he may start to show signs of redemption. The OC might inspire him to make different choices, and this exploration of his character's potential for good is a recurring element in these fanfics.
I'm sorry I can't directly recommend specific 'evil Sadao Maou x reader fanfic' as it depends on various fanfiction platforms. You could try searching on popular platforms like Archive of Our Own (AO3). There might be a lot of works there that fit this category.
One popular 'yandere Sadao Maou x reader fanfic' might be found on fanfiction.net. You can search there using the relevant tags. However, the availability and popularity can vary.
First, create conflict. For example, Maou's dark nature could lead to situations where he accidentally endangers the reader. This builds tension. Then, develop their relationship gradually. Don't rush into love. Let them learn about each other's quirks and secrets over time. Also, introduce side characters that either support or oppose their relationship. This adds more complexity. For instance, other dark beings who don't like Maou getting close to a human reader.
One common theme is the intense and often obsessive love of the yandere character, Sadou Maou. For example, he might go to extreme lengths to protect the reader. Another theme could be the power dynamics, as Sadou Maou might have some sort of power that influences the relationship with the reader. Also, the internal conflict of the reader in dealing with such an overbearing and obsessive love can be a theme. They might struggle between being drawn to Sadou Maou's passion and being frightened by his extreme behavior.
Well, 'OC's Impact on Maou's Realm' is another one. In this fanfic, the OC has unique abilities that disrupt and also improve Maou's world. It's an exciting read as it shows how the OC's presence affects the existing characters and the overall story arc in the world of Sadao Maou.
Common plot elements in 'dark sadou maou x reader fanfic' include the maou's internal conflict. He may be torn between his dark nature and his growing feelings for the reader. Also, there's often a sense of mystery surrounding the maou's past and motives. The reader may be on a journey to uncover these secrets, which drives the story forward.
Well, in a 'dark sadou maou x reader fanfic', the story could go in many directions. It could be a story of redemption where the maou slowly changes because of the reader. Or it could be a tragic love story where the differences between them, especially the maou's dark nature, lead to a sad ending. Another possibility is that it's an adventure - filled story where the reader and the maou team up against a common enemy, all while their relationship is evolving in the background.