Jahy is cute (I do prefer her grown-up form, though), but she is just a spoiled brat, which resulted in the episodes getting boring for me pretty fast.
It's clear, that the goal is to show how she becomes "good", but it's too obvious. I think Hataraku Maou-sama! did similar concept much better, especially since it had better dynamics between the characters.
It's ok to watch for the sake of a tanned girl with cat-ears, I guess, but I, personally, will not be wasting my time on it just for this.
