What happened? Why did they all become manipulators? I understand that the change of personality can be the effect of the curse, but the point of the story was that they were forced to do something they didn't want, now it seems that all their actions are planned. At this point they may no longer be under the influence of any curse and would do so anyway.
I don't know if I explained correctly. The plot here was that the characters were facing a great difficulty, and they try to solve it. Now it is becoming one of those many smut manga about "greed" which sooner or later leads to self-destruction