[Krono]

Originally Posted by aohige

Yes, it's not a harem story. However, Shiroe does get pretty popular with bunch of girls....

Spoiler:

Three of the main female characters are attracted to him, and another, an arch villain.

Spoiler:

I'm fairly certain that's sufficient that we can expect the word harem to be thrown around in connection with the series. As far as some people are concerned, multiple girls attracted to the main character = harem, regardless of whether or not it meets any other criteria for a harem story.