PshycoNinja
Member
Let's do a check on this - how many boys did the MC meet who wanted to be his friend? One. That's your standard one bro that your MC has in a harem show, see this season with Nisekoi, or any harem show ever made. How many women did he meet that shared more than one scene and who will no doubt be main characters? That's right, loads. Those are all going to want to his dick. Because.
I feel the prerequisite for a harem is that most of the girls like the MC and are are actively trying to get together with him. And the MC is trying to chose someone but has feelings for almost all of them. In this case, Mahouka doesn't do that. Nisekoi does do this and is, in fact, a harem.