 If you liked
Mahoutsukai no Yome
|
 ...then you might like
Colette wa Shinu Koto ni Shita
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Both manga feature a human girl building a relationship with a guy with supernatural identities. Mahoutsukai no Yome has a more serious tone to it, but both have their romantic and comedic aspects.
Sorry for bad English, I used google translator to write this.
Colette and Yome have quite similarities, such as the fact that the trait is minimally similar, at least to me, and the fact that the main characters actually had a reasonable development after meeting Hades in the case of Colette and Elias in the case of chise.