Yanderenobles Stories

Since yuichiro was captured by the vampires from a mission. The Queen of the vampires gave yuichiro the title as the new manager and he would stay with the vampire nobles houses for two days. What yuichiro didnt know is that the nobles had a secret. Will he survive 'till the end? This is probably going to get discontinued because I literally have no more ideas about this book, maybe I will update but it'll be really slow so I'm sorry:;(∩'﹏'∩);:message me if you want to give me an idea( ；∀；)

the blood line of first vampire is dormant in a boy that names is Lucifer