There is no obvious connection between Duk Koo Kim, a well - known boxer, and the movie Pulp Fiction. It's possible that it's a made - up or misinformed reference. The movie is filled with its own unique characters and storylines that don't typically involve a boxer named Duk Koo Kim. It might be a creative attempt to connect two disparate elements that don't actually have a real link within the movie's narrative.
I don't know who xqc is in this context without more details. It could be someone's username, a streamer, or just a name given to a character in a particular situation.
I'm not entirely sure specifically what 'xqc reacts to neuro story' is about without more context. It could be that xqc, perhaps a person or a character, is reacting to a story that has something to do with the neuro (which could potentially refer to neuroscience, neural networks, or something related to the nervous system in a more general sense).
One popular 'Overwatch Reacts' fanfiction could be the ones where the Overwatch characters react to different timelines or alternate universes. For example, they might react to a world where the Omnic Crisis was never resolved. Another could be their reactions to new heroes joining the team. It's all about exploring the characters' personalities through these reaction scenarios.
I'm not sure what 'cho duk bae my old story' specifically is. It could be a very personal or regional story. Maybe it's the name of a memoir or a family - related tale that only the person who named it knows the details.
Some Tumblr blogs are dedicated to sharing and promoting AOT fanfictions, including the reacts ones. You can search for relevant tags like #AOTreactsfanfiction on Tumblr. Also, Reddit has some subreddits dedicated to AOT. You might be able to find links to AOT reacts fanfictions in the posts or comments there.