Alya would probably be super excited and start planning everything from baby showers to future playdates. She'd be there for Marinette every step of the way, giving advice and support. Nino might be a bit more reserved at first but would soon warm up to the idea and be a great source of comfort for Adrien, like helping him pick out baby clothes or build nursery furniture.
You can try searching on fanfic platforms like Archive of Our Own (AO3) or Fanfiction.net. These sites have a large collection of fanfics, and by using the relevant tags such as 'Adrien', 'Marinette', and 'pregnant', you may be able to locate some interesting stories.
One plot idea could be that they discover they're pregnant unexpectedly. Maybe they're still in high school and have to deal with the reactions of their friends and family. Their friends could be initially shocked but then become very supportive. Another idea is that an akuma attack somehow affects the pregnancy, adding a layer of danger and drama.
One common theme is the exploration of their relationship. It shows how they support each other during this new phase of life. For example, Adrien might be extra protective of Marinette.
He could also be a bit worried. Adrien might think about the responsibilities that come with having a child. He might wonder if they are ready for this big step, considering their own lives and any potential challenges. He would then sit down with Marinette and have a serious conversation about how they are going to handle everything.
It could also be about the challenges they face during the pregnancy. Marinette might have health issues, and Adrien has to be extra careful and supportive. There could be a lot of emotional turmoil as they both grow up faster than they expected. They might also face some judgment from society, but they stand strong together to face it all.
One possible plot could be Marinette struggling to raise the baby on her own while dealing with the heartbreak of Adrien leaving. She might find support from her friends like Alya, who helps her through the tough times. Meanwhile, Adrien could be off on some self - discovery journey and later realizes his mistake.
They would become even closer. Their love would grow deeper as they are about to start a family together. There would be more tender moments between them.
One possible plot could be a story where Adrien is suddenly thrust into Marinette's world in an unexpected way. Maybe a magical mishap causes him to swap lives with her for a day. He'd then have to deal with her daily routines, like her family's bakery, her school projects, and her friendships. This would give him a whole new perspective on Marinette and might even lead to some self - discovery for him.
The main appeal is the relationship between Adrien and Marinette. Their dynamic is both cute and complex. Marinette has a huge crush on Adrien but is often too shy to act on it, while Adrien is somewhat oblivious yet has a special connection with Marinette. This creates a lot of tension and anticipation in the fanfic.