There are some. You can start by looking on fanfiction websites like Archive of Our Own. However, the availability and quality might vary. Some might be really well - written, delving deep into the relationship between Yoosung and the reader, while others could be a bit lacking. It really depends on your personal taste in terms of writing style and how the characters are portrayed.
Archive of Our Own (AO3) is a great place to start. It has a large collection of fanfictions, and you can use the search function to specifically look for yoosung x reader fanfictions. There's also Fanfiction.net which might have some as well.
Perhaps they start planning for their future. Yoosung could be thinking about his career and how he can support a family with the reader in the long run. They might also start thinking about traveling together, exploring new places and making new memories. For example, they could plan a trip to a beach destination, where they can relax on the sand, swim in the ocean, and have romantic dinners by the shore.
One sweet moment could be when Yoosung surprises the reader with a homemade dinner. He might have cooked their favorite dishes, with candles and soft music in the background.
There's 'Yoosung and 707: A New Chapter'. In this fanfiction, it begins with a misunderstanding between them. Yoosung misinterprets 707's actions, but through a series of events, they are forced to work together. This leads to them getting to know each other better and realizing that they have a lot in common. It's a story full of character development and emotional growth.
One common theme is the struggle against internal and external challenges. In 'v x yoosung fanfiction', they might face things like insecurities within themselves. V could be dealing with his own secrets and past traumas, and Yoosung might be struggling with his self - confidence or his future plans. The story then shows how they overcome these challenges together. There's also the theme of acceptance, accepting each other's flaws and all. This makes the relationship between them more real and relatable.
You can start by looking on Archive of Our Own (AO3). It has a large collection of fanfiction from various fandoms, and there are likely many yoosung x 707 stories there. Just use the search function and type in the relevant tags.
One common theme is friendship. They often start as friends in the original story, and in fanfiction, this friendship is explored further. For example, how they rely on each other during tough times in the game world.
Adventure can also be a theme. They might go on adventures together in the digital world or in the real world, facing challenges side by side. This not only tests their relationship but also makes it stronger as they rely on each other to get through difficulties.
The 'alternate universe' trope is quite popular too. In some fanfictions, they might be in a completely different world, like a high - school AU (alternate universe) where Saeran is the mysterious loner and Yoosung is the friendly classmate. Or they could be in a fantasy AU where they have different magical abilities and their relationship develops in that unique setting. These AUs allow for a lot of creativity and exploration of different relationship dynamics between the two characters.