A 'vampire system novel' is likely a type of novel that involves a system, perhaps a game - like or unique set of rules, in a vampire - themed story. For example, it could be a story where the vampire has a special system for hunting or for gaining power.
New vampire manga often has more diverse character designs. For example, they may include vampires with different powers and appearances. In traditional vampire manga, the vampires usually follow more of the classic Dracula - like features. Also, new vampire manga might explore different themes like modern relationships between vampires and humans in a more in - depth way.
I'm not entirely sure as I haven't read it specifically. But generally, a vampire - themed novel might be about the life of vampires, their powers, their struggles in a world full of humans or other supernatural beings.
To seduce a vampire in manga, you could try being mysterious and alluring. Maybe have a unique style or personality that catches their attention. Also, showing bravery in the face of danger could make you stand out to them.