You can start by looking on fanfiction websites like FanFiction.net or Archive of Our Own. These platforms usually have a wide range of fan - created content, including yugioh 5ds lemon fanfiction. Just use the search bar and type in the relevant keywords to find what you're looking for.
Friendship is also a big theme. The OC might start as a stranger to Luna but then they develop a deep friendship through shared experiences, like helping each other out in difficult situations or just having common interests in the world of duels.
To develop their relationship realistically, start with the male OC having a reason to be interested in Jack. It could be his dueling skills, his status, or his charisma. Jack, on the other hand, should initially be aloof or dismissive as he is a bit of a prideful character. Then, through repeated interactions like duels or shared experiences, they can start to see each other in a new light. For example, if the OC helps Jack in a tough duel against a common enemy, Jack will start to respect the OC more.
One popular place to find Yugioh 5ds Luna x OC fanfiction is Archive of Our Own (AO3). There are many stories there that explore different relationships between Luna and original characters. Just search for 'Yugioh 5ds Luna x OC' on the site.
One plot idea could be that the male OC is a new duelist in the city. He idolizes Jack and tries to get his attention by constantly challenging him. As they duel more, Jack starts to respect the OC's skills and a friendship forms. Another could be that the OC has a special card that Jack is interested in, leading to a series of events where they have to team up against a common enemy who also wants the card. And finally, the OC could be from a different dimension and his unique dueling style catches Jack's eye, and they embark on a journey to learn more about each other's worlds.
Aki survives in the manga. The plot doesn't lead to his death. Maybe there were some tense moments that made you think that, but ultimately, he makes it through.
Another one is 'The World Ends with You'. It has a unique setting in modern - day Shibuya. The story is full of mystery and the character relationships are really interesting. You play as Neku, a boy who has to fight in a strange game to survive, and as you progress, you uncover more about the world and its rules.