Don't you mean Nisekoi? He's the son of the of the chief of police and she's the daughter of the daughter of the head of the yakuza. There's a third girl, but I forget the familial relationship that she held. If so, I've seen the anime, and it was good. I like Mangapanda, but I prefer Manganel. Love Hina is another series that I recommend. It's a harem anime, but I prefer the manga. It was done by Ken Akamatsu, who also did Mahou Sensei Negima and Ai ga Tomaranai. Have checked out KOR yet?