Hakuouki, Otome Youkai Zakuro Recommendations
otome youkai zakuro and hakuouki has some kind of demons and they are both have romance
They have 4 similarities: (1) Both are set in a historic period of Japan. (2) The characters of the two anime both fight mythical creatures (demon in Hakuouki, spirit in Zakuro) (3) Both anime have romance in it, and (4) The male characters of both anime are bishounens.
Both of these animes have a really Japanese feel to it. Other than Japanese practises, they both incorporate the fantasy genre into them.