Another plot could be that the OC is an outcast too, for different reasons. When Jaune is expelled, they find common ground. They could then decide to leave the place together and start their own journey. Along the way, they learn more about each other's pasts and develop a strong bond while also trying to find a way to prove Jaune's innocence in the events that got him expelled.
Jaune is the character who has been expelled, so he is central to the plot. His character might be dealing with feelings of betrayal, confusion, and a desire to clear his name. The OC, on the other hand, could be a very unique individual. They might have their own goals and motives that initially seem separate from Jaune's situation. But as the story progresses, their paths become intertwined. For example, the OC could be a healer who decides to help Jaune because they sense his innocence, and their relationship develops from there.
One reason could be false accusations. Maybe someone frames Jaune for a serious offense he didn't commit, like cheating in an important exam or stealing valuable items from the school. Another reason might be his inability to keep up with the academic or combat requirements. If he fails too many classes or consistently underperforms in combat training, the school might decide to expel him.
One interesting plot could be them building a life together after marriage. They might face challenges like how to combine their different combat styles into a training regime for the next generation. For example, Jaune's more unorthodox approach and Pyrrha's highly skilled and precise style could be passed on in new and unique ways.
Another plot could involve the baby having some special abilities or a unique origin. This could lead to Jaune having to protect the baby from those who might want to use it for their own purposes. For example, there could be villains who are after the baby because of its power.
One possible plot could be Ruby trying to prove her innocence. Maybe she was framed for something she didn't do. For example, a powerful relic goes missing and Ruby is wrongly accused. She then has to embark on a journey outside of the school to find the real culprit and clear her name.
Maybe they travel to a time long before the events of the story, during a period when the kingdoms were first being established. They get involved in the ancient politics and power struggles, and in the process, they discover secrets about the origin of the Grimm and the power of the Relics that were long forgotten. Their actions in this past time could have a huge impact on their present world.
Another plot could involve the OC being a healer and Genma getting seriously injured on a mission. The OC uses her skills to save him and in the process, they start to develop feelings for each other. As Genma recovers, they go on small adventures around Konoha, strengthening their relationship.
One interesting plot could be the OC being a healer who tends to Jaime's wounds after a battle. Their relationship starts as a patient - healer dynamic but gradually evolves into something more romantic as they get to know each other's true selves.
Jaune could also become angry and frustrated. He might feel that the system is unfair and that he's being wrongly punished. So he could lash out at those he believes are responsible for his expulsion, whether it's a fellow student who set him up or a teacher who didn't give him a fair hearing. In some cases, he may even try to expose the wrongdoings or secrets of the school as revenge for his expulsion.
One interesting plot could be their first encounter. Maybe it's at a grand tournament where Oc Targaryen, with his noble Targaryen air, catches Genna Lannister's eye. Another plot could involve them facing a common enemy and having to work together, which gradually turns into a deeper relationship. Or perhaps a plot where they are forced into a political marriage and have to navigate their new relationship while dealing with the expectations of their respective families.