There is no romance or harem in these novels.... more>>
If you are wondering where to find some of the novels, here are the links.
My Disciples Are All Villains - https://www.lightnovelpub.com/novel/my-disciples-are-all-villains-10051457#:~:text=MyDisciplesAreAllVillainsnovelisapopularlight,otherchaptersareinprogress.
I’ve Possessed the Demon Sovereign’s Body-https://www.readwn.com/novel/ive-possessed-the-demon-sovereigns-body.html?tab=chapters
Dark Blood Age - https://www.lightnovelpub.com/novel/dark-blood-age-17031322