Highschool DxD: What could a Rias and Issei wedding fanfiction be like?

One great fanfiction idea could be that Issei discovers a new power within himself that is directly linked to Rias's heritage. Maybe he can tap into an ancient magic that only works in harmony with Rias's own powers. As they train together to master this new ability, their relationship deepens beyond just the typical master - servant bond in the Highschool DxD world.

One idea could be a story where Issei and Rias have to go on a special mission together in a parallel dimension. In this dimension, they lose their powers and have to rely on their wits and the bond they've developed. They face challenges that test their relationship and force them to understand each other on a deeper level.

One interesting plot point could be the challenges they face in planning the wedding. Maybe there are rival factions who try to disrupt the preparations. Another could be the discovery of an ancient wedding ritual that they must perform, which adds a layer of mystery. Also, Issei might struggle with feeling worthy of marrying Rias, considering her noble status.

A popular fanfiction is 'Issei and Rias: United Front'. It portrays them as a powerful duo against their enemies. The author does an amazing job of writing their interactions, making it seem very natural. The story also has some great plot twists that keep readers engaged. You can find these fanfictions on various fanfiction websites. Just search for 'Highschool DxD Issei x Rias fanfiction' and you'll get a whole list to choose from.

One possibility is that they would face many challenges together. Since they are from different worlds in a sense, they'd have to deal with the politics of the devil world. Their relationship might be a symbol of change, leading to more cooperation between devils and humans. Also, their engagement could bring about a new era of peace in the 'Highschool DxD' universe.

In some fanfiction scenarios, Rias might be involved in a political intrigue within the 'Highschool DxD' world that Issei doesn't understand or approve of. Her actions during these events, such as making alliances with characters Issei distrusts, could lead to his dislike. Also, if she were to accidentally expose Issei to danger due to her own miscalculations in these political games, that would surely sour their relationship.

Power - up themes are also quite common. Issei often gets new powers or abilities, and Rias may play a role in that. For example, in some fanfictions, Rias helps Issei to master a new form of his Sacred Gear. This not only strengthens Issei but also deepens their bond as they train together. Another aspect is the exploration of the supernatural world in the context of their relationship. Since Highschool DxD has a rich supernatural setting, fanfictions may expand on this, like how Issei and Rias face new threats from the underworld or other dimensions together, which further cements their relationship and showcases their individual growth.

One idea could be that Issei leaves Rias because he realizes he has different goals in the supernatural world. He might want to focus on helping the weaker devils rather than being part of Rias's peerage. So he sets out on his own journey, making new allies and facing new challenges.

One possible plot could be that they decide to have a traditional wedding in the Underworld. All their friends and allies from the different factions in Highschool DxD come together. Koneko might be initially hesitant but then fully supports her sister Kuroka. Issei would be nervous but excited, and there could be some comical moments as he tries to follow all the wedding customs.

One possible reason could be that Issei has different goals or ideals. Maybe he wants to focus more on his own personal growth in power rather than getting involved with Rias. He might see their relationship as a distraction from his main aims.