Every genre has at least one really bad habit, and harem has arguably the most. For example: the girls/boys attracted to the MC only interact with said MC. Not in Interviews though. Takahashi the MC is there, but he's not really there to be a love interest. They treat him that way at times, but it's not a big part of the overall story. Plus he's an older man, which has never been done in a harem.