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.
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.
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. Their bond might be explored as they face various challenges together.
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.
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.
One common theme is self - discovery. The OC may be on a journey to find themselves, and Takashi can play a role in that process. Another theme is friendship evolving into love. At first, they might be just friends, but as the story progresses, deeper feelings develop. Also, themes of loyalty and protection are often present, as Takashi is known for his protective nature, and he might extend that to the OC.
Another theme could be character growth. As Takashi navigates the complex relationships in the harem, he may grow as a person. And for the harem members, they might also develop in terms of their own personalities and how they relate to Takashi. It can also involve themes of friendship within the harem, despite the romantic undertones. They might support each other in different ways while still vying for Takashi's attention. Additionally, some 'takashi x harem fanfic' may have themes related to adventure or a common goal that the group has to achieve, which further complicates and enriches the relationships.
A common theme is survival. Since they are often in post - apocalyptic or dangerous settings, their relationship is tested by the need to stay alive. Another theme is loyalty. They are shown to be loyal to each other no matter what challenges they face.
Survival is a common theme. Given their apocalyptic setting, stories often show them relying on each other to stay alive. For example, they might fight zombies together while also strengthening 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.