Well, one possible plot could be that they face unexpected challenges. Maybe they're still in school and have to deal with the reactions of their friends and family. They might struggle with how to continue their studies while preparing for a baby.
One popular theme could be the journey of Nagisa through pregnancy, like dealing with the physical and emotional changes. Another might be the reactions of the people around her, such as her friends and family. Also, there could be themes related to preparing for the new life, like setting up a nursery or choosing a name.
Well, when writing Nagisa pregnant fanfiction, start with a strong concept. It could be something like Nagisa discovers she's pregnant in an unexpected way. Then, build the story around her daily life during pregnancy. Describe her routine, her doctor visits, and her cravings. Make the characters in the story feel real by giving them their own personalities and motives. And always keep the story engaging by adding some drama or conflict, like a problem with the pregnancy or a disagreement with her partner.
One common theme could be the anticipation and excitement of starting a family. It might focus on how Tomoya and Nagisa prepare for the arrival of their baby, like setting up the nursery.
A really heartwarming fanfiction idea could be Nagisa and Tomoya going to prenatal classes together. They learn about different breathing techniques for childbirth and get to know other expecting couples. Through this experience, their bond grows stronger, and they start to envision their future as a family more clearly.
I'm not sure about specific 'tomoya and nagisa pregnant fanfiction' stories off - hand. You could try searching on popular fanfiction websites like Archive of Our Own or FanFiction.net. They usually have a wide range of stories for different fandoms.
Writers should focus on the character traits. Nagisa is shy and gentle, so in the fanfiction, her reactions to pregnancy should reflect that. For example, she might be a bit hesitant to share the news at first. Also, keep the themes of family and friendship strong, just like in the original Clannad. The friends' support during Nagisa's pregnancy can be a big part of it.
One possible fanfiction could be about Nagisa, as a girl, having to deal with the unique challenges in the Assassination Classroom. Maybe she uses her newfound femininity to her advantage in different assassination attempts. For example, she could play on the stereotypes that others might have of a girl being less of a threat, only to surprise her opponents.