You can try looking on some well - known fanfic platforms like Archive of Our Own (AO3). It has a large collection of fanfics from various fandoms, so there's a good chance you'll find 'ryo asuka reader fanfic' there.
One great 'ryo asuka reader fanfic' could be about Ryo Asuka's adventures in a magical realm where the reader is his guide. It could involve solving mysteries and facing fantastical creatures together.
Akira Fudo and Ryo Asuka's relationship is complex. They have a deep bond that could be seen as a form of love. Ryo brings out different sides of Akira. Their story is filled with moments of intense connection and mutual understanding, though it's also fraught with challenges due to their different natures.
One key moment could be their first meeting which set the foundation for their relationship. Another might be when they faced a major crisis together and relied on each other.
Love is a very common theme. It often shows the development of romantic feelings between Ryo and the reader. Another theme could be friendship turning into love. Maybe they start as friends and then slowly realize they have deeper feelings for each other.
One common theme is the exploration of the complex relationship between Ryo and the reader. Given Ryo's character in Devilman, it often involves themes of loyalty and betrayal.
I don't have any data to suggest whether it's popular or not. It could be a niche fanfic that only a small group of fans who are interested in the character Asuka and the specific concept of baby oil in the story are aware of.
There's a fanfic titled 'Akira and Ryo: A Different Path'. In this story, it takes a more alternate universe approach. Instead of the tragic events in the original, they end up on a journey together to discover a new way to coexist with the demons. It's a really interesting take on their relationship as it shows them growing closer in a more positive environment.
Fanfiction.net could be another source. There are likely to be various ryo x reader fanfictions there. Some might be more angsty, like dealing with misunderstandings between Ryo and the reader, while others could be more light - hearted and fun, focusing on cute moments between them.
Power - up or growth themes are common too. They might face challenges that force them to become stronger, both individually and as a pair. And sometimes, there are themes related to redemption, where one of them has made a mistake in the past and the other helps them find a way to make up for it in the fanfic.