@gigabarto what if... since it seems that the author wants to make vampires related to nazuna closer to mc, the story will go in a way that creates potential shields for the MC. Even i can see a route going to shonen manga where all the introduced vampires will fight against another group of vampire or vampire hunters OmegaLUL. In spite of that, the writing will be truly interesting to explain the vampire universe and probably might even intercept with the concept how to live. TBH, the concept is what attracts readers since depression seems popular these days.