One possible plot could be that Harry Potter, while on a new magical adventure, somehow gets transported to the world of Highschool DxD. He could use his unique magic skills to help the characters in Highschool DxD deal with their own supernatural threats. For example, his Patronus charm might be effective against some of the evil creatures in the DxD world.
Well, perhaps in this crossover fanfiction, the Hogwarts houses could be combined with the peerage system in Highschool DxD. Harry, being a natural leader, could form his own peerage with some of the students from Hogwarts and some characters from Highschool DxD. They could then compete in a magical tournament that combines elements of both worlds, like a Quidditch - like battle but with the devils' and angels' powers also in play.
One possibility could be the magic systems interacting. In Harry Potter, magic is more about spells and potions, while in Highschool DxD, it's more about the power of Devils and Angels. If they were in a crossover, perhaps the characters from Highschool DxD could learn the structured magic of Harry Potter, like Hermione teaching Issei how to brew a Polyjuice Potion. This would create some really fun and chaotic situations.
A plot could involve a threat that endangers both universes. So, Harry Potter and his friends team up with Issei and his group. They start by trying to understand each other's worlds and powers. As they do, they find that their combined magic and skills are the key to defeating the common foe. This could involve things like the Hogwarts students teaching the Highschool DxD characters about complex spells, while the Highschool DxD characters share their combat techniques and unique powers.
One idea could be that Harry Potter somehow gets transported to the world of Highschool DxD. He could use his magic skills in the unique battles and challenges there. For example, he might use spells like Expelliarmus to disarm the devils or fallen angels during a fight.
One idea could be that Harry Potter, while exploring some new magic, accidentally opens a portal to the DxD world. He then has to adapt to the new rules and powers there. Maybe he teams up with Issei and they use a combination of Hogwarts magic and Sacred Gears to fight off a common enemy.
One possible plot could be that Ichigo somehow gets transported to the world of High School DxD. He might initially be seen as a threat by the devils and angels there due to his unknown powers. But as they learn about his motives of protecting people, they start to work with him. Ichigo could also teach the characters in High School DxD about his unique fighting style and the concept of Hollow and Soul Reaper powers, leading to new and exciting battles against common enemies.
Well, a cool plot might involve Issei from Highschool DxD being sent to the Naruto world. He could learn ninjutsu there and then bring some of those skills back to his own world. He might befriend Naruto and they could work together to fight a common enemy that has somehow crossed between the two worlds, like an evil group that wants to take over both the ninja world and the world of devils and angels.
One possible interesting plot could be Sasuke arriving in the Highschool DxD world during a time of chaos. Maybe there's a new threat that neither the devils nor the other factions can handle easily. Sasuke's ninja skills and Sharingan would give him an edge in combat. He could form an alliance with Issei and his group, teaching them some ninja techniques in return for learning about the supernatural powers in their world.
Yes, there are likely many non - sexual crossovers. Fans often create crossovers to explore how the magic of Harry Potter might interact with the supernatural elements of Highschool DxD in a more family - friendly or plot - driven way. They might imagine characters from both universes teaming up to face a common enemy or sharing knowledge about their respective worlds.
Yes, there might be. The 'fanfiction' world is vast and diverse. There are often crossovers that combine different popular franchises in unexpected ways. However, the quality and nature of such a fanfiction can vary greatly. Some might be really creative, while others could be a bit of a mess.
One interesting crossover could be the characters from Highschool DxD attending Hogwarts. Imagine Issei trying to learn magic spells while also using his devil powers. It would create a lot of chaos and humorous situations.