Is that there's nothing special about it. It's a generic shoujo manga with a Yakuza family, and it's also really disjointed, busy and inconsistent. For instance, right at the beginning every man in the family, Rakuto included, instantly falls at Sachie's feet, eager to please. She's a nice kid and all, but even though she's their ojou, I can't imagine it happening just like that. She never really does anything to earn it; she just kind of acts like a normal person, and they're all "Ojou! You're so amazing! Here, have our love!"
The great plus point of this manga is the unique setting, and it's just screaming out for chapters and chapters about how Sachie gets to grow into her place there, gets to know more people (aside from prerequisite love interest), her thoughts and emotions (other than being flustered over pretty boys), learning new things, looking from new perspectives, and earning the trust of the people around her. All that is just wasted on chapters and chapters of Rakuto saying sappy things, and she never gets used to any of it, either.
So overall, kind of a disappointment. I wouldn't have been quite so harsh, because it wasn't THAT bad, but like Kevadu said, it was just so promising! I kind of feel a little cheated somehow.