Another interesting plot could be a time - travel fanfiction. Miyuki and Sawamura are sent back in time to the early days of their baseball careers. They use their present - day knowledge and skills to change some of the mistakes they made in the past, which in turn has a big impact on their current team's success.
For Sawamura, his character could be developed by exploring his insecurities more deeply. In fanfiction, he could have moments where he doubts his abilities as a pitcher, not just in terms of his skills but also his mental strength. Miyuki could then be the one to help him through those tough times, which would strengthen their bond.
One plot idea could be a new character joining the baseball team and becoming a 2nd lover to one of the main characters, causing some drama among the team. Another could be a time - travel plot where a character goes back to change an event in the Diamond no Ace story and in the process finds a new love.
One plot idea could be that the reader is a new team manager and Chris, being the ace, has a bit of a tough exterior at first. But as they interact more during practices and games, they start to develop a deep friendship that slowly turns into something more. For example, the reader could be the one to notice a small flaw in Chris's pitching form that no one else has, and through that, they bond over improving his game.
A possible plot could involve a mystery surrounding an ancient power that only Blue Diamond and Pink Diamond together can unlock. It could start with strange events occurring in their realms that seem to be connected to this power. Also, a plot about them swapping places for a day and learning about each other's responsibilities and the challenges they face would be interesting. There could also be a story where they discover a hidden prophecy that involves their fates being intertwined in a way they never expected.
A great plot for Ace Combat 3 fanfiction might be to create an alternate timeline. In this timeline, a major battle from the game was lost instead of won. This would change the entire political and military landscape of the game world. Pilots would have to deal with a much harsher reality, and new alliances would have to be formed to survive. It could also explore how the characters would change in this new situation.
Another plot could involve a group of pilots from different nations coming together to fight a common, mysterious enemy force that doesn't belong to any known country. Their different flying styles and cultures clash at first but they learn to work together for the greater good.
One interesting Ace of Diamond OC fanfiction could be about an OC who is a talented but overlooked pitcher. The story might focus on their journey to prove themselves in the team. For example, they start from the bench but through hard work and unique pitching techniques, they gradually earn the respect of their teammates and coaches.
Perhaps the Diamond Girl gets trapped in a glitchy part of the game. This part of the game has distorted landscapes and strange creatures. She has to find a way to escape while also trying to figure out what caused the glitch in the first place. She might need to use her knowledge of the game's code, if she has any, to get out.
One idea could be exploring an alternate universe where the main characters have different Pokemon partners. For example, instead of Dawn having Piplup as her starter, she could start with a Chimchar. Another plot could revolve around a mysterious new Pokemon that only appears in a long - forgotten part of the Sinnoh region. It could be a Pokemon with unique powers that both the good and bad guys are after. Also, a story about a trainer who travels through Sinnoh backwards, starting from the Pokemon League and working their way to the beginning of their journey, facing challenges in reverse order.
A plot could revolve around a trainer who gets lost in a mysterious part of Sinnoh that is not on any regular map. In this area, they encounter Pokemon with strange behaviors and new evolutionary forms. The trainer has to figure out how to get back home while also learning about these new Pokemon, perhaps with the help of some local characters who have their own secrets.