Common themes include the exploration of different social groups. Kagome could be part of a more friendly and outgoing group while Sesshomaru is in a more exclusive one. Their interaction across these groups is often a theme. Also, there's the theme of facing challenges together. Maybe they have to work on a school project or deal with a bully, which brings them closer.
A possible high school fanfiction could involve a school dance. Sesshomaru is forced to attend by his family. Kagome is excited about the dance. They meet at the dance and initially have an awkward encounter. But then something happens, like a prank by some other students that forces them to team up. As they work to get back at the pranksters, they start to see each other in a new light and a bond begins to form between them.
To write this fanfiction, think about their personalities. Sesshomaru is proud and often aloof. In high school, he might be the top student but not very sociable. Kagome is kind and adventurous. You can start the story by having Kagome transfer to Sesshomaru's school. Their first meeting can be a bit hostile as Sesshomaru is not used to new people. As the story unfolds, introduce school events like sports day or a school play. Have them interact during these events, gradually developing feelings for each other. Also, don't forget to add some side characters from the original universe to make it more interesting.
One common theme is the power dynamic between Sesshomaru and Kagome. Sesshomaru is a powerful demon and Kagome has her own unique powers as the reincarnation of Kikyo. Their relationship often explores how these powers interact.
The theme of transformation is quite common. Kagome might experience some sort of transformation, either physically or mentally, due to her association with sesshomaru, the vampire. Also, the idea of redemption can be found. Sesshomaru, who may be seen as a 'dark' character as a vampire, could find redemption through his relationship with kagome. And of course, there's always the theme of adventure as they navigate the vampire - filled world together.
Love against all odds is also a frequent theme. Given their initial enmity or indifference towards each other, seeing them fall in love and become mates is a central aspect. Their relationship often has to overcome obstacles like other suitors, family expectations (in sesshomaru's case, perhaps his clan's view), and their own personal biases.
One common theme is the idea of overcoming differences. Sesshomaru is a demon and Kagome is a human with spiritual powers. Their different natures often create conflict at first but then they learn to accept and even rely on each other. Another theme is growth. Both characters usually grow as individuals throughout the story, influenced by their interactions with each other.
Common themes include the power dynamic between them. Sesshomaru is a powerful demon and Kagome has her own spiritual powers, so how they interact in terms of power is often explored. Friendship is also a theme that can develop into something more. As they face various challenges in the Inuyasha universe, they start to rely on each other, which can lead to deeper emotional connections. And sometimes, there's a theme of redemption for Sesshomaru, with Kagome being a part of that journey.
One common theme is the bridging of two different worlds. Sesshomaru from the demon world and Kagome from the modern world. Another theme is the acceptance of each other's differences. Since Sesshomaru is a powerful demon and Kagome is a human with spiritual powers.
One common theme is the forbidden love aspect. Since they are from different species and often on different sides in the original story, the idea of them overcoming these barriers is popular. Another theme is redemption. Sesshomaru may find redemption through his love for Kagome.
One common theme is the growth of their relationship. Starting from distrust or indifference, they gradually come to understand and care for each other. Another theme could be adventure. They might go on quests together, facing various demons and challenges, which brings them closer. Also, the theme of cultural clash might be present, as kagome is from a different time and has different values compared to sesshomaru.