Well, perhaps Apollo and Percy are in a secret relationship. The pregnancy could be a result of a magical experiment gone wrong. They then have to hide it from the other demigods and gods. Percy might be worried about how his friends will react, while Apollo is more concerned with the divine implications. They could go on a journey to find a way to reverse it, but along the way, they start to bond more with the unborn child.
A possible plot could be that Apollo is cursed, and Percy gets caught in the crossfire. The pregnancy is part of the curse, and they need to find the source of the curse to break it. Along the journey, they face many challenges, like dealing with monsters who sense the strange new power within Percy. Meanwhile, their relationship evolves from reluctant partners in this situation to something more loving as they face the difficulties together.
One plot idea could be the challenges they face in a world that is not fully accepting of their situation. They might have to deal with the judgment of other characters while also preparing for the arrival of the baby. Another could be the discovery of new powers or abilities that are awakened due to the pregnancy.
Well, perhaps there could be a fanfiction where a new deity emerges with the power to manipulate the very essence of the gods. This deity targets Artemis and causes her to become pregnant. Apollo, being very protective of his sister, decides to fight against this new threat. The story could explore the relationship between Apollo and Artemis in a new light, as they struggle with this unexpected situation. It could also show how the other gods react to this strange occurrence, some might be sympathetic while others could see it as a sign of weakness or a threat to the order of the pantheon.
One plot idea could be that Percy, Apollo, and Hermes have to team up to solve a mystery in the demigod world. Maybe there's a strange new threat that's affecting the powers of the gods and they need to figure out the source. Another could be a sort of race or competition between them where they learn more about each other's strengths and weaknesses.
One idea could be exploring how Percy and Bianca deal with the unexpected pregnancy in a world full of mythological challenges. Maybe they have to seek help from the gods or other demigods to ensure the safety of the unborn child.
Perhaps in the fanfiction, Nathan and Max are in a world where they are part of a special group or have unique powers. Their pregnancy could be a result of some kind of magical or extraordinary event. They then have to deal with not only the pregnancy but also protecting their unborn child from those who might want to use its potential powers.
Percy would probably start to see the world in a different light. His focus might shift from just fighting monsters to also thinking about the future of his unborn child. He could become more serious and less impulsive. Apollo would need to learn about mortal limitations more deeply. He may start to rely on Percy's human wisdom more. Their relationship would develop as they learn to communicate better about their fears and hopes for the baby.
A possible plot could involve a parallel dimension. Percy and Artemis get pulled into a parallel dimension where the laws of nature are different. In this dimension, their powers interact in an unforeseen way and Artemis becomes pregnant. They must find a way to return to their own dimension while also dealing with the consequences of this new situation. They could encounter strange creatures and face unique challenges that test their abilities and their relationship.
One idea could be that Apollo and Hermes team up for a musical competition across the realms. Apollo uses his musical talents and Hermes uses his speed to spread the word and gather audiences. Another could be a story where they swap their powers for a day and have to deal with the consequences. For example, Hermes struggles to control Apollo's sun - chariot while Apollo has a hard time with Hermes' winged sandals.
A more emotional plot idea could be that Nami gets pregnant by someone she loves deeply, but that person is lost or in danger. She then has to go through the pregnancy alone, with the support of the Straw Hat crew. The story could focus on her growth as she becomes a mother - to - be and how she overcomes the challenges without her partner.
One idea could be that it's a magical accident due to a misfired spell. Maybe Harry was trying to help someone with a fertility spell and it backfired on him. Another could be that it's part of some ancient prophecy where a male must carry a child for a great purpose. And perhaps there's a new type of magic that allows male pregnancy and Harry is the first to experience it in the wizarding world.