There were many surprises in the latest chapter, and from what I've discussed with my friends we all found it a bit too unexpected and most of it seemed out of character even for the character's of Setsu and Cain.
I think he stopped viewing her as a child a long time ago or he would not be so in love with her but I do think it is saying she broke Kuon's spell. And the out of character part came from Tsuruga not being able to control himself as Cain which made Kyoko not being able to stand that idea caused her to use shock treatment on him.(I am curious to see how much of a shock) At least that is how I viewed it.
I think it was just himself waking up from his unhappy Kuon state of mind... because he associate Kyoko, young and old, as his safe haven where he will always be happy....but his jealousy over Sho was making him no longer see her....so she broke the wall that was separating her from connecting to him because he kept trying to push her away....okay i kinda confused myself there....but the important part....will the Cain siblings finally misbehave together....Me and the director applaud Ren for his self control but now the chick is straddling you unzipping your shirt offering to leave kisses on your chest...she needs some loving to....is not her then me....hehehe
well at first i think that he is thinking that Kyoko as a child but in the end he realize that Kyoko has a maturity that he has never seen so probably that's why he would become so love like that to her. i think that could be one of the way to break the trauma he has of what he had done before.
but i think there is something getting to be a little awkward. Kyoko looks so different than usual. is it the way how she perform Setsuka Heel ?