I don't understand what people have against the arc. It's great. Nagi has gotten some much needed character development and Ruka has pretty much broken every rule of a harem female character. What's not to love?
I thought it would be Hayate, but you can tell that's wrong. I'm guessing it's going to be her manager. The one who didn't support Ruka that much with the manga, would be supporting Ruka when she buys it.
did ruka hold back though? and since she claims whoever sells the most wins, since she sold her last copy to kayura it's still a draw since she sold out.