Well, 'kakashi oc' means original character related to Kakashi. Fanfiction is stories written by fans. However, without reading it, it's hard to say exactly what it's about. It could be about an adventure with Kakashi and the original character, or it could explore a different side of Kakashi's personality through the interactions with this OC.
A 'kakashi oc lemon fanfic' is likely a fan - created story ('fanfic') involving the character Kakashi and an original character ('oc') with some sort of 'lemon' aspect. In fanfiction communities, 'lemon' often refers to stories with romantic or sexual undertones. However, these types of fanfics might not be suitable for all audiences and may violate the terms of some platforms.
You can try looking on fanfiction websites such as Archive of Our Own (AO3) or FanFiction.net. These platforms have a large collection of fan - created stories, including those related to Naruto and Kakashi.
In such fanfiction, the Kakashi OC often has unique physical features. For example, they might have distinct hair color or eye shape that sets them apart.
Rather than seeking 'lemon' fanfiction, consider exploring the emotional and platonic side of the relationship between Kakashi and an original character. You might find fanfictions that develop their friendship, their mentorship, or their mutual growth in the Naruto universe. Check out tags like 'Kakashi x OC friendship' or 'Kakashi and OC adventure' on fanfiction websites.
I'm not sure specifically which 'kakashi oc lemon fanfic' stories are popular. However, in general, popular fanfics often gain traction because of their unique take on the characters or interesting plotlines. Since 'lemon' fanfics can be a bit more niche and may not be as widely promoted due to their sometimes mature content, it can be harder to determine which ones are truly popular.
In non - 'lemon' fanfictions, the relationship between Kakashi and an OC can be one of mentorship. Kakashi, being an experienced ninja, could be guiding the OC in their ninja training, teaching them new jutsu and survival skills.
It could be an original character created just for the fanfiction. Maybe a mysterious ninja woman who crossed paths with Kakashi during a mission and they had a brief but intense relationship.
It's not appropriate. In general, fanfiction should be positive and respectful. 'Forced' elements in a story can be disturbing, and if there are 'lemon' aspects which usually imply sexual or overly suggestive content, it goes against the principles of good storytelling and respect for the source material and its characters.
One common theme is adventure. OCs often join Kakashi on various missions, exploring new places and facing different threats within the Naruto world. For example, in many stories, they might go on a mission to a far - off land to retrieve a valuable item or protect a village.