There could be. Fanfiction often explores different scenarios and relationships. But it can be a bit difficult to find as it depends on the popularity of the characters Tomoe and Nanami in the fanfiction community. You may need to search through multiple fanfiction websites like Archive of Our Own or FanFiction.net to see if such a story exists.
One possible plot could be that Tomoe and Nanami have a deepening relationship, and an unexpected pregnancy occurs which then forces them to face various challenges together, like how to deal with their families and their own future.
Their relationship would likely become more intimate and protective. Tomoe would be constantly by Nanami's side, ensuring her safety and well - being. He might become more possessive in a loving way, not wanting any harm to come to Nanami or the unborn child.
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.
One possible plot idea could be that Nanami discovers she is pregnant unexpectedly. Tomoe is initially shocked but then becomes overprotective. They start preparing for the baby's arrival, like Tomoe building a nursery in their home with his magic. And they have to deal with the reactions of the spirit world, some being happy for them while others are worried about the half - human, half - spirit baby.
One possible scenario in such a fanfiction could be Nanami and Tomoe going on a journey to the spirit world together. They might face various challenges there, like dealing with mischievous spirits. Tomoe, with his powerful yokai abilities, would protect Nanami throughout the adventure. And Nanami, with her kind heart, could end up making friends with some of the spirits they encounter.
In a Tomoe x Nanami fanfiction, it would be interesting to write about a situation where they have to pretend to be a married couple for some spirit - world related reason. They would have to deal with all the implications of that, like sharing living quarters and acting affectionate in public. This would force them to confront their true feelings for each other.
A possible fanfiction plot could be Nanami accidentally loses her powers and Tomoe has to protect her while also trying to find a way to restore her powers. In the process, they discover new things about each other and their feelings grow stronger. It could be a story full of action, a bit of angst, and a lot of tender moments.
Well, transformation is also a theme. Nanami's growth as a character and how Tomoe adapts to it is often part of the stories. Also, the theme of loyalty is quite prominent. They are always there for each other, no matter what. In addition, the cultural elements of their world are often explored, like the Japanese mythology that surrounds them.
In the fanfiction, perhaps the arrival of the baby changes the relationship between Tomoe and Nanami. They become more united as they focus on raising their child. Tomoe, who was once more aloof, becomes a very protective father, and Nanami is a loving and gentle mother.