You can try some dedicated fanfic websites or forums. Some popular ones include Wattpad and Archive of Our Own. They might have a section for Korean fanfics.
You might find BTS fanfics on dedicated fanfiction apps or social media groups dedicated to BTS. Sometimes, fans also create blogs where they post their fanfics. Do a bit of online exploration, and you'll likely come across some good reads.
Fanfiction.net is another option. There are likely to be some Borderlands lesbian fanfics there. However, the tagging system might not be as refined as AO3's, so you might need to do a bit more searching. You can search for relevant keywords like 'Borderlands' and 'lesbian' to find the fics you want.
You could also try FanFiction.net. It has a wide variety of fan - created content, and there are likely to be some Tom Hiddleston love fanfics there. However, the quality may vary, so you might need to do some searching.
You can start by looking on fanfiction.net. It has a large collection of fan - created stories for various books, including 'The Last Olympian'. There are different categories and search filters that can help you narrow down to the exact type of fanfic you're interested in.
Fanfiction.net is also a popular option. There are numerous fan - written stories about Star and Marco. Just be aware that the interface might be a bit more dated compared to AO3. But it still has a wide range of content that could include the type of fanfic you're looking for.
You can try Archive of Our Own (AO3). It has a large collection of fanfics from various fandoms, including 'Red Dead Redemption'. There's a good chance you'll find gay fanfics there.