One theme is the fear of the unknown. Usagi and Mamoru are facing a situation they've never been in before, with the pregnancy and the sickness. There's also the theme of family. They are starting their own family, and this situation tests their commitment to each other and to the future family. Additionally, the theme of growth. Through this difficult time, both Usagi and Mamoru grow as individuals and as a couple.
Love and sacrifice is a common theme. Mamoru would sacrifice his time and energy to take care of Usagi. Another theme could be the power of friendship. Their friends would likely come to their aid during this difficult time. Also, the theme of hope. Despite Usagi being sick, there is always hope for her to recover and have a healthy baby.
The plot could involve Usagi's sickness being related to some sort of magic or enemy plot. Since she's pregnant, her powers might be affected. Mamoru, being the loving partner, searches for a cure while also protecting Usagi. There could be a lot of emotional turmoil as Usagi is worried about the baby and Mamoru is torn between finding a solution and being by her side all the time. Eventually, with the help of their friends, they figure out what's wrong and Usagi recovers, ready to give birth to a healthy baby.
Love is a very common theme. Since Usagi and Mamoru have a strong romantic connection in the original story, fanfictions often expand on their love, like how they overcome obstacles to be together.
Some fanfictions focus on the magical aspect of their pregnancy. Since they are both connected to powerful magic, the unborn child could have unique magical abilities even in the womb. This might attract the attention of other magical beings, both good and bad. Usagi and Mamoru would then have to deal with this new situation. They could also be visited by visions or prophecies about their child's future, which would add an element of mystery and excitement to the story.
Yes, there are likely some family - friendly Usagi Mamoru pregnant fanfictions. Some writers might focus on the more innocent aspects like how they prepare for the baby, the emotional changes in their relationship in a very pure way, without any inappropriate content.
You can try some popular fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfictions, and you can use the search function to look specifically for 'Usagi Mamoru pregnant' fanfictions. There are often filters you can use to sort by rating, length, etc.
One common plot could be the shock factor. When the pregnancy test shows a result, whether positive or negative, it shocks them both. For example, if positive, Usagi might be initially scared but then grow excited about having a family with Mamoru. Another plot could be secrecy. They might try to keep the test result a secret from their friends until they are sure what to do.
Some fanfictions may focus on the challenges they face during the pregnancy. This could involve health scares, financial concerns, or work - life balance issues. It's also common to see themes of love and commitment being strengthened through the experience of expecting a child together. The idea of building a family and the future they envision for themselves and their baby are often explored as well.
In another scenario, Usagi and Mamoru could be at a ball. They dance gracefully together, lost in each other's eyes. After the ball, they take a stroll along the beach. The sound of the waves crashing against the shore sets a romantic mood. They hold hands tightly and exchange sweet nothings, reaffirming their love for each other.
Some amazing usagi x mamoru fanfiction include 'Destiny's Bond'. This story really emphasizes the fated nature of their relationship. 'Love Beyond Time' is another good one where they are able to traverse different timelines to be together. And 'The Rose and the Moon' which uses symbolism of the rose (associated with Mamoru) and the moon (associated with Usagi) to tell a heartwarming story about their love.
One popular one might be 'A New Beginning for Usagi and Mamoru' which explores their relationship in a unique way. It delves into their emotional connection as well as some tender moments between them.