One common theme is the power imbalance. Since vampires are often depicted as more powerful than humans, in a BL context, this can create an interesting dynamic between the two male characters. Another theme is the struggle with identity. The vampire character may be struggling with his vampiric nature while also dealing with his feelings for the other male character.
A frequent theme is the allure of the forbidden. Vampires are usually seen as something that humans should stay away from, but in BL novels, the two male characters are drawn to each other despite this. There is also the theme of immortality. The vampire's immortality can bring both a sense of loneliness which the other character might try to fill, and also a different perspective on life and love. For example, in some novels, the vampire has seen so much over the years and yet is still captivated by the new love with the other male.
One common theme is forbidden love. Since vampires and werewolves are often portrayed as natural enemies, their relationship goes against the norms of their societies. For example, in many novels, they have to keep their love a secret from their clans.
The theme of forbidden love often appears. Since it's BL, in a horror context, the love between the two male characters might be seen as something that goes against the norm in the spooky world they are in. Maybe there are forces trying to keep them apart because of their relationship, which adds an extra layer of drama and horror to the story.
Power dynamics also play a role. There could be a dominant and a submissive character, which adds an extra layer of tension and excitement to the relationship. This can be seen in novels where one character is in a position of authority, like a CEO or a senior in a school, and the other is more inexperienced.
One common theme is self - discovery. The transmigrating character often has to figure out who they are in a new world and how they fit in. For example, they might discover new abilities or aspects of their personality. Another theme is the changing of fate. They try to change the original plot, especially when it comes to the fate of the male love interest.
One common theme is self - discovery. The transmigrated character often has to re - evaluate who they are in a new world and new relationships, especially in a BL context. For example, they might discover new aspects of their sexuality. Another theme is power dynamics. There could be a power struggle or a power imbalance between the two male characters at the start which then evolves over time.
Power imbalance is a common theme. One character often has more control or influence over the other, which can lead to the 'abusive' nature of the relationship. For example, in some novels, a wealthy or more socially powerful character can manipulate the other.
Survival and hope are also prevalent themes. The war prisoner often has to fight for his survival in a difficult situation, and the relationship with the other character can become a source of hope. In some novels, they rely on each other to get through the tough times in the prison or war - affected area.
One common theme is self - discovery. The transmigrated character often has to figure out who they are in the new world and in the context of their new relationship. For example, in many novels, they might discover new aspects of their personality through their interactions with their love interest.
Betrayal can be a theme as well. When one character feels betrayed by the other, either because of false accusations or actions that seem to go against their relationship, it adds a layer of sadness. This can lead to a breakdown in their relationship and a lot of emotional pain for both characters involved.
Obsession is a very common theme. The yandere character is often overly obsessed with the object of their affection. For example, in 'Killing Stalking', the yandere character's obsession drives a lot of the dark and disturbing plot.