i'm looking for a romance manga where one of the protagonists isn't human and don't look like one, like something that couldn't be mistaken for a human... i don't want any vampires or ghosts or demons if they look human... animal tails/ears or strange eyes or horns alone arent enough.
an example of what i'm looking for would be the side couple from 1/2 prince yulia and ugly wolf... i guess this request may be hard enough already, but if it has action i'll be even happier, tought it isn't really necessary

Monster Musume no Iru Nichijou
Appleseed definitely doesn't look like a human

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The anime Brigadoon comes to mind... Melan Blue definitely doesn't look human, lol... the romance isn't overt but it's there. The anime is weird and surprisingly good.