it's easy to get my attention with the words 'vampire' and 'otome', but keeping my interest is not so easy. the art, story, and characterization however, have done that. my only suggestions at the moment would be to give the reader a bit more influence over the mc's personality/choices. we tend to be forced to be passive and sweet in these types of games, and i think that especially with being a vampire, it would be a real shame to not even have the option of being more confident.
It sure would be nice but given this game hasn't received a single update (not even an status update) since 2017, I'd say the chances of it being dead or abandoned are high. I also went and looked for it on Lemma Soft forums and it was the same - last post on 2017. Better look for other games to play instead.