Coming from someone who's an European, I've noticed that the game is rated 12+ on Windows Store. This is fine with me... though I haven't played the JP version too much, but this game looks like it might have some things that warrants this rating.
However, this game is Mature Rated in NA or at least, outside of Europe. I don't get what makes this game Mature rated, usually if the game is M rated on NA then really high/good chances are it'd be 16+ or 18+ in EU. Which makes me think the rating discrepancy implies this game may have more than I'll be expecting.
Is there any content that makes the rating mature? Besides, of course, the breasts for the perverts, of course. And I'm not going to play as a female, just as a head up.