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.
A really interesting plot idea could be that there's a girl who is a huge fan of Diamond no Ace. She somehow gets involved with the team in a more personal way and becomes a 2nd lover to one of the players. This relationship then affects the player's performance on the field, either positively or negatively. There could also be a plot where the team goes on an overseas trip and during that time, one of the players meets someone who becomes his 2nd lover, and this new relationship challenges his loyalty to the team and his goals in baseball.
Well, a possible plot idea is that there's a mysterious person who has a deep connection to the baseball world in Diamond no Ace. This person turns out to be the 2nd lover of one of the players. Maybe this person has some special knowledge or ability that helps the team in unexpected ways. Also, a plot could involve a love triangle between two players and a new girl who comes into their lives, all while they're striving for success in baseball.
A potential 2nd lover character could be a childhood friend of one of the players who has just moved back to town. She has always had feelings for him, but he was so focused on baseball before that he didn't notice. Now that she's back, she could be the 2nd lover in the fanfic. Another option could be a coach's daughter. She's around the team a lot and starts to develop feelings for one of the boys on the team.
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.
One idea could be a story where Blue Diamond and Yellow Diamond have to team up to face a new threat from a far - off galaxy. They put aside their differences and combine their powers in unique ways.
One idea could be a story about a rookie pilot who has to overcome their fear in the heat of battle. They start off shaky but through various missions, they gain confidence and become a key asset to their squadron.
One idea could be to explore a case where the main character has to defend a supernatural being. It would add an element of mystery and the need to adapt legal strategies to non - human circumstances.
Maybe the cryptic lover is a time - traveler who leaves hints about future events to their beloved in the form of strange symbols and words that seem out of place in the current time period. For example, they might draw a symbol that doesn't exist yet but will be important in a future technology. This adds an air of mystery and the lovers must figure out the meaning together.
Well, perhaps the lost lover was sent to another dimension by some sort of magical or scientific accident. And the story could revolve around the main character finding a way to bring them back. Or, the lost lover could be a time - traveler and got stuck in a different era, and the plot is about the protagonist's journey to reunite with them across time.
One idea could be focusing on the children of the main BNHA characters dealing with new villains who have unique powers. They could struggle to live up to their parents' legacies while also finding their own identities.
One interesting plot idea could be that Klavier and Trucy team up for a magic - themed legal case. Klavier's logical legal mind and Trucy's magical charm could create a unique dynamic as they work to prove their client's innocence. For example, Trucy could use her magic tricks to help Klavier find hidden evidence during the trial.
Well, perhaps in the fanfic, there could be a plot where Whitebeard decides to train Ace, Sabo, and Luffy in a new form of combat. This training could lead to them developing new powers or techniques. Also, they might get involved in a political intrigue within the pirate world while associated with Whitebeard. Like, they have to deal with other pirate lords who are jealous of Whitebeard's influence and try to undermine him by targeting the three brothers.