Read at your own risk.
Ren deceived Kyouko by saying that it is because he is cursed that that he’ll give misfortune to the people around him.
Kyouko said that she is willing to do anything to remove the curse.
Thus, Ren hinted it to her by pointing his finger to his lips.
And, surely, you guys know what Ren is hinting to a girl who loves fairy tales which involves removing a curse using the lips. =P
So..is the mangaka teasing us again? Maybe Kyouko would say that she likes someone else = Ren? Oh well, it would be interesting to see how she’ll react to that =P