I don't think it's a common topic. The BTS fandom is more focused on things like their comebacks, new music videos, and the members' individual growth. Fanfics usually revolve around positive relationships or exciting adventures involving the members, rather than a situation where they are ignoring one of their own like in 'bts ignoring v fanfic'.
Fanfics are generally works of imagination by fans. But this one with the term 'boner' seems inappropriate. If we were to rewrite this in a proper context for a BTS V fanfic, it could be about his charm, his influence on others, or his experiences while traveling or performing. Fanfics are meant to celebrate the artist in a respectful and positive manner.
To be honest, I don't know if there are popular 'bts v fainted fanfic'. Fanfic popularity is a bit of a mystery in general. It could be that some fans have written such stories, but they may not have gained widespread attention. The BTS fandom is huge and diverse, so while there could be a 'bts v fainted fanfic' out there, it's difficult to say if it has reached a level of being popular without doing extensive research on fanfic platforms.
A 'bts v fainted fanfic' could potentially be about V fainting from overwork. In the world of K - pop, idols are often very busy. The fanfic might explore the reactions of the other BTS members, the fans, and how V recovers. It could also touch on themes like the importance of taking care of oneself in the cut - throat entertainment industry.
A prevalent theme is the struggle between duty and personal desires. V, as a Hwarang, has certain duties to fulfill, but he also has his own personal dreams and desires. Fanfics play around with this conflict, showing how he navigates through it. It makes for a very interesting and relatable read as many people face similar conflicts in their own lives.
Friendship is a very common theme. Fanfics often explore the deep bond between Jimin and V, showing how they support and care for each other. Another common theme is their shared dreams and goals as part of BTS, like in fanfics that depict them working hard together towards a big concert or an award.
Friendship is a very common theme. Since Jungkook and V are known for their close bond in real life, many fanfics explore different aspects of their friendship, like how they support each other during tough times.
Friendship is a very common theme. Since Suga and V are bandmates in BTS, many fanfics explore the depth of their friendship, like how they support each other through tough times.