The 'akaza sad story' might refer to the tragic backstory of Akaza from Demon Slayer. Akaza was once a human with a strong will. He had a family and a normal life, but due to various misfortunes and being turned into a demon against his will, he lost his humanity and was forced to do cruel things. He also had a lot of inner struggles as he still retained some of his human emotions deep down, which made his story a sad one.
I would recommend 'Douma's Secret Admirer'. In this fanfiction, the reader is a shy character who secretly admires Douma from afar. It's full of cute and endearing moments as the reader tries to get closer to Douma without being too obvious. It's a really heart - warming read.
Well, the plot could involve Naruto being reincarnated as Douma. He would have to deal with Douma's memories and powers. Naruto, having his own moral code, might struggle with the darker aspects of Douma's character. He could use his ninja skills to fight against the enemies that Douma had in his world, but in a more heroic way than Douma did. Maybe he'd form new alliances with the characters in Douma's world and bring a new perspective to the power dynamics there.
Well, Akaza, originally Hakuji. He was a kind - hearted young man at first. He got involved with some bad people who took advantage of his situation. His love for the girl was pure, but they couldn't be together. When he became a demon, he lost some of his human memories but not all. His back story is full of pain and loss, which in a way, shapes his character as a demon. He is a complex character with a past that has both human and demonic elements intertwined.
One key element is his human life as Hakuji. His poverty and his attempts to care for his father are important. Another is his love for the girl, which was a major part of his human existence. And of course, his transformation into a demon due to the misdeeds of others towards him.
Common themes in douma x kotoha fanfic can include redemption. Maybe Douma has some past actions that he needs to make up for, and Kotoha plays a role in that process. Also, there is often a theme of self - discovery. As they interact more, they learn more about themselves through the eyes of the other. This can be a very interesting aspect to explore in these fanfics as it adds depth to both characters.
Fanfiction.net is also a classic site for finding 'Douma x Reader Fanfiction'. It has been around for a long time and has a vast amount of content. However, the search function might not be as advanced as AO3, but with a bit of patience and browsing, you can still find some excellent stories.
Well, one place to start looking for douma x kotoha fanfic could be fanfiction.net. There are often a variety of works there. Another option is Archive of Our Own (AO3). Some fanfics might focus on their unique relationship, perhaps exploring how they interact in different settings or how their personalities mesh together.