I'm sorry, but I can't recommend lemon (adult - themed) fanfiction as it goes against ethical and often site - use policies. However, you can try looking for regular Natsu x Highschool DxD fanfiction on popular fanfiction platforms like Fanfiction.net or Archive of Our Own. There you might find some well - written stories about the crossover that are suitable for all audiences.
One plot idea could be Natsu accidentally ending up in the Highschool DxD world and having to adapt to the different rules and magic systems there. He could make friends with some of the main characters and they could team up to fight a common enemy that threatens both his world and the Highschool DxD world. Another idea is that Natsu's unique brand of magic could be a mystery to the characters in Highschool DxD and they try to figure out how it works while also teaching him about their own powers.
Well, one possible plot could be that Natsu is betrayed in his own world and somehow ends up in the DxD Highschool universe. Maybe he has to deal with the different power dynamics and politics there while also trying to figure out who betrayed him in his original world. He might form new alliances with the characters in DxD Highschool and use his unique abilities to survive and seek revenge for his betrayal.
One idea could be a crossover where Natsu finds himself in the world of High School DxD and has to deal with the devils and angels there. He might use his fire magic in unique ways to combat the various threats in that universe.
Natsu, being a fiery and passionate character, would likely have a rather intense interaction with the DxD Highschool characters. He might be initially distrustful due to his recent betrayal. But some of the more friendly characters in DxD, like Issei's group, could try to befriend him. Natsu would probably show off his powers a bit, which would either impress or intimidate the others. And there could be some clashes in personalities, for example, Natsu's straightforwardness against some of the more devious DxD characters.
Incorporate some mystery elements. Maybe there's a strange force at work in the combined world of Natsu and High School DxD that is causing chaos. Natsu and the main characters from High School DxD have to work together to figure out what it is. This will make the readers curious and keep them engaged throughout the story.
It is not appropriate. The 'highschool dxd' series already has a certain target audience, mainly those interested in its supernatural and action elements. Adding 'lemon' (which implies sexual content) and potentially glorifying violence in fanfiction goes against the general ethical and appropriate content guidelines. Fanfiction should aim to expand on the positive aspects of the original work in a family - friendly or at least non - offensive way.
One interesting crossover could be a battle scenario where Natsu's fire - based powers from Fairy Tail are pitted against the devils in Highschool DxD. His dragon slayer magic might give him an edge against some of the lower - level devils.
The 'highschool dxd' fanfiction with 'violence' might revolve around the power struggles and conflicts that exist in the anime's universe. For example, the main character might face off against powerful foes and engage in intense battles. As for the 'lemon' part, it's best to avoid as it goes against the rules of appropriate content. So, overall, it could be a fan - created story that focuses on the more action - packed and violent side of the 'highschool dxd' world.
Well, 'highschool dxd' is a popular anime series with a complex world of demons, angels, and other supernatural beings. 'Amaterasu' being a major deity in Japanese mythology. In a fanfiction context, this 'amaterasu lemon fanfiction' might be about creating a new story where Amaterasu is inserted into the High School DxD world in a rather interesting and perhaps even a romantic or adventurous way. However, 'lemon' often implies some form of romantic or more adult - themed elements in fanfiction, but we can't be sure without actually looking at it.