Perhaps the fanfic could explore the relationship between Sadayo Kawakami and the father of the child. If it's a character from the Persona 5 universe, how do they react to the news? Do they support her? Or is there some sort of drama or tension between them? It could also show how the other characters in the game react to her pregnancy, whether they offer help or have different opinions about it.
I'm sorry, I don't have specific fanfics to recommend directly. You can try searching on fanfic platforms like Archive of Our Own (AO3). They have a large collection of fanfics, and you might be able to find some related to Sadayo Kawakami being pregnant by using relevant keywords in their search function.
You can start by looking on popular fanfiction websites like Archive of Our Own (AO3) or FanFiction.net. Just search for 'Sadayo Kawakami x Protagonist' on their search bars. There might be a good amount of stories there, ranging from different genres and writing styles.
A good fanfiction in this pairing would have well - developed characters. It should show Sadayo Kawakami's personality as a teacher and her relationship with the protagonist in a believable way. Maybe it explores her strict side in class and her softer side outside of it.
One storyline could be that a character accidentally gets pregnant. For example, if it's a minor character, she might be scared to tell her parents. So she turns to the main characters for help. They then have to figure out how to support her without getting in trouble themselves.
A storyline might involve D.Va facing the physical and emotional changes that come with pregnancy. She could be worried about how her pregnancy will affect her performance in combat, or she might have to deal with the public's reaction to the news. There could also be a focus on her support system, such as her family and friends helping her through this new phase in life.
One possible storyline could be about Gwen facing the challenges of being a superhero while pregnant. She might have to deal with villains who try to take advantage of her condition. Another could be her preparing for the arrival of the baby, like setting up a nursery with her friends and family's help. And also, there could be a story where she discovers new powers related to her pregnancy that help her protect herself and the unborn child.
One possible storyline could be that they accidentally get caught in a situation where a magic spell makes Nami pregnant. Zoro then has to quickly come to terms with becoming a father and they embark on a journey to find a way to reverse it, but during this time, they start to bond in a new way over the unborn child.
One possible storyline could be Princess Cadence preparing for the arrival of her baby. She might be seen redecorating the nursery, choosing baby names, and sharing her pregnancy experiences with her friends and family. For example, she could have heart - to - heart talks with Twilight Sparkle about the joys and fears of motherhood.
In a fanfic, Tsunade's pregnancy might be a result of some sort of experimental medical jutsu gone wrong. Naruto could be the one to find a way to reverse it if she doesn't want the baby, or he could help her through the difficult pregnancy. He could also help protect her from those who might see her pregnancy as a weakness to exploit in the village.
One possible storyline could be that Princess Celestia discovers she's pregnant and has to deal with the political implications within her kingdom. Her pregnancy might cause a stir among the nobles and commoners alike, as they wonder about the future of the realm with an heir on the way.