One great fanfiction idea could be that Nanami and Tomoe go on a journey to the spirit world to solve a mystery that threatens the human world. Along the way, they face various challenges that test their relationship and their individual powers.
In such a fanfiction, it could be that the pregnancy brings out a new side of Tomoe. He might become more domesticated, learning to cook special meals for Nanami. Nanami would be glowing with the pregnancy, and their relationship would be filled with new - found tenderness. Their friends in the spirit world and human world would also be involved. Mizuki might give Nanami some unique gifts for the baby, like a magical amulet for protection. Kurama could offer his wisdom on how to raise a child with powers. The whole story could be about how this pregnancy not only changes their lives but also the relationships they have with those around them.
A plot could be where Nanami and Tomoe accidentally swap powers for a day. Nanami has to deal with Tomoe's fox powers and all the mischief that comes with it, while Tomoe has to handle being a land god and dealing with human requests. It would be a comical yet also a character - building situation.
Another interesting one could be 'Tomoe's Promise to Nanami'. In this story, Tomoe makes a solemn promise to Nanami, and the rest of the fic is about how he tries to keep it. It shows their loyalty and deep connection in a really touching way.
You can start by looking on popular fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfictions, and you can use the search function to specifically look for Kamisama Kiss fanfictions related to Nanami and Tomoe.
One possibility could be a story focused on how they prepare for the baby. Tomoe, with his centuries of knowledge, might be overly cautious. He could start gathering all kinds of magical items to ensure a safe pregnancy for Nanami. Nanami, on the other hand, would be excited yet also a bit nervous. She'd probably try to keep up with her shrine duties as much as possible while also dealing with the physical changes. They might also face some challenges from the spirit world, like jealous spirits or ancient curses that target pregnant women in the spirit realm. But together, they'd overcome these difficulties with their love for each other and their future child.
I really like the fanfic 'Tomoe and Nanami: Unspoken Promises'. It focuses on the more subtle moments between them. There are many sweet scenes where Tomoe shows his protectiveness over Nanami in his own unique way. It's a relatively short but very engaging read.
The kiss in the fanfiction might be described in a very detailed and passionate way. It could involve the emotions they are feeling at that moment, like love, longing, or a sense of finally giving in to their feelings. It might also include physical details such as the softness of their lips, the way they hold each other, and the intensity of the moment.
The unique personalities of Tomoe and Nanami make their kiss special. Tomoe might be his usual reserved self, but the kiss could be a moment where he lets his guard down completely. Nanami, on the other hand, could bring her own charm and innocence to the moment, making it a tender and heart - warming encounter.
A common theme is the slow - burn romance. Given Kurama's initial aloofness and Nanami's determination, their relationship often develops gradually in fanfiction. Another theme is Kurama's past affecting their relationship. His history can add depth and drama to their interactions.