spirited-away's manga / #Human x Demon(1)

ML: Good-natured, Loyal, unknowingly powerful FL: romantic, loyal, powerful Antagonists: (Human Kingdom), self-absorbed Side Characters: Powerful and Good natured Atmosphere: MCs are wholesome, but the antagonists are frustrating and ridiculous **ML is originally from a magic world summoned in a similarly magical world. Does not make a harem despite numerous women involved with the ML.