One common theme is the development of their relationship. It could be about how they first meet and start to have feelings for each other. Another theme might be adventure. They could be on a journey together and their relationship deepens during the adventure.
One common theme is friendship. Their bond might be explored as they face various challenges together.
One common theme is survival. Given the setting of Highschool of the Dead, they often face challenges together and rely on each other for survival.
Survival scenarios are also quite common if these characters are from a post - apocalyptic or action - oriented anime. They might have to rely on each other in dangerous situations, which can bring out different aspects of their relationships. For example, Takashi might have to protect Rei and Saeko from threats, and this can strengthen or test their bond.
Another theme is the growth of their relationship. It might start as a simple friendship or a reluctant alliance, but as they face challenges together, it evolves into something deeper. There could be moments of jealousy or misunderstandings as well, which are common in relationships.
A common theme could be cultural exchange. Since Harry and Takashi likely come from different cultural backgrounds, the fanfiction might explore how they learn from each other's cultures. For example, Harry could learn about Takashi's traditional values and vice versa.
Love and romance are also very prevalent. Writers often explore the development of their relationship, from initial attraction to deep love. They might write about their first date or how they confess their feelings.
One common theme is friendship. Rei and Usagi have a strong friendship in the original series, and fanfictions often expand on that. They might go through challenges together and come out stronger.
One common theme is the exploration of their relationship. This could involve them falling in love, dealing with misunderstandings in their relationship, or growing closer over time. Another theme is adventure. Since they are often in some sort of action - oriented world, fanfiction might focus on their joint adventures, fighting against enemies and overcoming obstacles together.
Love, either platonic or romantic, is also a frequent theme. Sometimes it's a slow - burn type of love where they don't realize their feelings for a long time. Other times it's a more immediate connection that they have to navigate through various obstacles in the story.
Another theme could be self - discovery. Through their relationship, both rei and kazuki might learn more about themselves. In these fanfictions, they might have internal struggles that are resolved with the help of their friendship.