Well, another option could be to check out relevant fan communities on social media platforms. For example, on Reddit, there might be subreddits dedicated to this particular fandom where fans share their fanfictions or know where to find them. You could also search on Tumblr, as it has a large community of fanfic writers and readers.
You can try looking on some popular fanfiction websites like Archive of Our Own (AO3) or FanFiction.net. They usually have a wide range of fanfictions, and you might be able to find ones related to Sword User ID and Rias' love there.
I'm not sure specifically for Sword User ID and Rias love fanfiction, but in general, in the world of fanfiction, some authors become well - known within their fandoms. You can often tell by the number of views, reviews, and bookmarks their stories get on platforms like AO3 or FanFiction.net.
One great example could be a fanfic where the Sword User OC saves Rias from a dangerous situation, and from that moment, a deep bond forms between them. The OC's unique sword skills add an exciting element to their relationship as they face various challenges together in the underworld.
Some niche anime - related forums might also be a good source. Members often share their own written fanfictions or recommend ones they've read. However, the search might be a bit more difficult compared to the larger fanfiction platforms, but it can be worth it as you might find some unique stories.
You can try some popular fanfiction websites like FanFiction.net or Archive of Our Own (AO3). These platforms usually have a large collection of fanfictions, and you can search for 'rias and issei love' specifically to find relevant works.
A unique way to develop their relationship could be through a magical bond. Maybe the sword of the OC has a special magic that links it to Rias. As they explore this magic together, they grow closer. For example, the sword might have the power to show their shared memories or future possibilities, which would make their relationship more complex and deep.
The ID of the fast-handed work could be found through the search function of the fast-handed app. On the fast-handed APP's homepage, click on the search icon and then enter the ID of the work you want to find in the search box and press the search button to find the work. If you're using the QuickHand PC browser extension, you can enter the QuickHand search box in the browser, press the search button, and then view the list of works in the QuickHand APP. You can find the work ID in the list of works.
You can try websites like FanFiction.net or Archive of Our Own (AO3). These platforms have a vast collection of fanfictions, and you can simply search for 'Naruto and Rias love' in their search bars. There are likely to be many different takes on their relationship there.
You can usually find the story ID on the fanfiction website's page for that specific story. It might be displayed near the title or in the story's metadata.
Another option is to search on Tumblr. There are many fanfiction enthusiasts on Tumblr who might have reblogged or written Naruto and Rias kiss fanfiction. You can use relevant tags to narrow down your search, like '#Naruto #Rias #Fanfiction'.
Finding Naruto and Rias married fanfiction can be a bit of a hunt. Start with the big fanfiction platforms. Some authors might also post their work on personal blogs or Tumblr. You could also join Naruto or High School DxD (where Rias is from) fan groups on Facebook or other social media platforms. Ask the members if they know of any such fanfictions. There are often hidden gems in these communities that don't show up in the general search engines right away.