Highschool DxD: What are some interesting plot ideas for a Rias x Riser fanfic?

A great fanfic idea could be that Rias and Riser are sent on a joint mission to the human world. They have to blend in as high school students. This would be a comical and interesting premise as they struggle to adapt to human life while also dealing with their own relationship. Rias might be more empathetic towards humans, while Riser could be more arrogant at first.

One possible fanfic could be about a friendly rivalry between Rias and Riser that turns into a mutual respect. For example, they could start competing in various magical challenges within the Highschool DxD universe. This would show their growth as characters and how they overcome their initial differences.

One idea could be that the OC has a unique power that helps Rias and her harem in unexpected ways. For example, the OC might be able to sense danger before it arrives, allowing them to better prepare for battles against other factions. Another plot could involve the OC having a past connection to one of the members of Rias' harem, which creates some drama and tension as they navigate their new relationships within the harem. Maybe the OC is a long - lost relative or an old friend who has changed a great deal.

Their relationship could be developed uniquely by having them exchange roles. For instance, Rias could take on some of Riser's responsibilities in the Underworld for a while, and Riser could do the same in Rias' territory. This would give them a deeper understanding of each other's worlds and the pressures they face. They would then be able to support each other in new ways, leading to a stronger relationship.

One idea could be that the male OC has a unique power that Rias needs to protect her peerage. So they start working closely together, and slowly feelings develop. For example, the OC might be able to sense impending danger to the group in a way no one else can.

The plot could involve a power - transfer situation. Sirzechs, being a very powerful devil, might decide to transfer some of his power to Rias for a special mission. This would put Rias in a new position of strength but also bring new responsibilities. She would have to learn to control this new power while also dealing with the jealousy or suspicion of other devils.

One plot idea could be Goku arriving in the Highschool DxD world and having to adapt to the different rules of magic and devils. He might end up in a tournament where he shows off his Saiyan powers in unexpected ways. Another could be him teaming up with Issei to fight a common enemy that is a threat to both the human world and the Underworld. Maybe a powerful demon is using a new type of magic that Goku has to figure out how to counter.

One idea could be a story where Issei and Rias have to face a new, powerful enemy that targets their relationship. Maybe an ancient demon who sees their bond as a threat to the traditional demon hierarchy. Another plot could be a time - travel story where they go back in time and have to deal with past events that could change their present relationship. For example, they might have to stop an event that would have otherwise led to their separation.

Well, a possible plot could be Rias having to balance her pregnancy with her studies at school. She's not just a devil but also a student. There could be comical moments like when she has sudden cravings during class or struggles to fit into her school uniform as her body changes. Also, the relationship between Rias and Issei could deepen in new ways. They might have to face challenges together, like dealing with over - protective family members from both the human and devil sides.

There's a fanfic called 'Rias and Issei: A New Adventure'. In this one, they go on a journey together that tests their relationship. The author does a wonderful job of portraying their feelings for each other and the challenges they face as a couple in the world of Highschool DxD.