One popular ichigo and highschool dxd fanfiction is 'Ichigo in the World of High School DxD'. It has an interesting plot where Ichigo is transported to the High School DxD universe and has to deal with all the supernatural elements there. Another one could be 'The Fusion of Ichigo and Issei', which explores what would happen if the powers of Ichigo and Issei were combined in some way.
Well, 'A New Beginning for Ichigo in High School DxD' is a fanfiction that's quite good. It starts with Ichigo arriving in the High School DxD world and not really understanding all the rules and politics at first. But as the story progresses, he starts to adapt and even influence the world around him. There's also a fanfic where Ichigo teams up with some of the heroines from High School DxD to fight against a common enemy that threatens both his world and the DxD world, though I can't recall the exact name right now.
One great Highschool DxD fanfiction is 'A Devil's Tale'. It has an interesting plot where the main character, a reincarnated devil, has unique powers and goes through various challenges in the DxD world that are different from the original story. Another one is 'Rising of the Gremory'. It focuses on the growth and development of the Gremory family members in new and exciting ways.
There's also 'The New Order of 'Highschool DxD''. This fanfiction offers a fresh take on the story, with unique twists on the power dynamics and relationships. It's a great read if you want something different from the original.
Some highschool dxd fanfictions are centered around the relationships between different characters. For example, the relationship between Rias and Issei is a common theme. These fanfictions can show their love story in different ways, adding more depth and details to their relationship compared to the original work.
A third idea could be a time - travel fanfiction. For example, a character from Highschool DxD travels back in time to the era of Bleach and meets Ichigo when he was still developing his powers. This could lead to some interesting interactions and changes in the timeline of both universes.
Ichigo could be a game - changer. His Hollow - like powers might be mistaken for some sort of demonic or otherworldly ability in the Highschool DxD setting. This could lead to both misunderstandings and interesting interactions with the characters there.
One possibility could be that Ichigo's powers would make him a very unique and powerful character in the Highschool DxD universe. His zanpakuto abilities and high - level combat skills could give him an edge in the battles against the devils and other supernatural beings in that world.
A fanfiction could focus on Ichigo attending the school in Highschool DxD. His presence would surely disrupt the normal balance. He might not be interested in the whole 'devil' and 'angel' thing at first, but gradually get involved. He could also introduce some of his Soul Reaper training methods to the students there, which would be very different from what they're used to.
First, you need to understand the characters well. For Ichigo, know his personality traits like his determination and his sense of justice. For the Highschool DxD characters, understand their hierarchies and their goals. Then, come up with a unique plot. It could be a battle - oriented story where Ichigo and the DxD characters fight a powerful enemy together. Or it could be a more slice - of - life story where Ichigo adapts to the strange new world of DxD.
Another great fanfiction could be 'When Superman Joins High School DxD'. Here, Superman decides to enroll in the school in the DxD world. His actions and decisions, guided by his strong moral compass, create a lot of interesting situations. It's a story full of adventure, as he has to deal with the various challenges and temptations that the DxD world presents while staying true to himself.
There's also 'Ophis's New Adventure'. In this fanfiction, Ophis embarks on a journey to discover more about the human world, which brings out her curious side. It has some great plot twists and engaging dialogues that keep the readers hooked.