i want a good monster girl romance, like Onimote, rosario to vampire (i and ii), to love ru(and darkness). these are all good examples, but the harem part isn't necessarily required, please, i'm having difficulty finding new ones to read

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And in the end, all others bowed before the might of the zorblax armies.

Dance in the Vampire Bund (vampire)
Kitsune no Yomeiri (fox)
Nariyuki Makase no Tengu Michi (tengu)
Sankarea (zombie)
Shuukaku no Juunigatsu (fox/dog/wolf?)
The Voynich Hotel (witch, not really a monster, but should read it anyway)
Jigokuren (devil)
Itoshi no Kana (ghost)
Shingetsutan Tsukihime (vampire)
Tasogare Otome x Amnesia (ghost)

thank you guys for the suggestions, i hadn't read Maou na Ore,Kitsune no Yomeiri, Nariyuki Makase no Tengu Michi, or Jigokuren yet. and they are now on my list, if you can think of any others that would be great

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And in the end, all others bowed before the might of the zorblax armies.

How about Superior (demon queen) and its sequel Superior †?
And I haven't read Ookami to Koushinryou (fox? girl) yet but it seems good