@aufrive slice of life are just.. you know, their daily life. But the main story starts progressing around ch 60 i'd say and is currently heading towards what seems a conclusion.
And the duke can't really be anything but a "beta" since he literally kills anyone he touches...
This is so bloody badass, i wonder how he's moving thou as i'd imagine even a vampire would die when losing their heart, i know they said its through willpower but i don't know if that's all there is, he was already a strong human so maybe the boost you get from becoming a vampire is directly...
i have a feeling he will build a harem, but they will be always 1 step behind him and never catch up until the end of the series. Would be hilarious if that was the case