Hang on, Ren is envious of Kon/Corn apart from hating him. What bugs him most, is that the part about himself that he hates most is the part that the girl he loves, likes and is more open to. he's jealous of his old self that he wishes never existed.
On top of that kon/Corn hates Ren because when she's with him, she talks about Ren and he somehow feels jealous or rather annoyed by it.
In the end it's the same body, but there are times I get the feeling that Ren and Kon/Corn are two different personalities clashing for control and Kyoko's affection.
But I agree, Kyoko has been rather stupid the last few chapters, but that is part of her personality. Fairy tales were her escape from reality as a child so she still thinks like that even now...
Also too Kon isn't supposed to be known as Ren or vice versa it's his way of being able to walk around without fan girls latching unto him.
I don't see them kissing in next chapter cause the make-up woman is looking for Ren, I can smell her running into them. Ren's, kon cover may be broken if she calls out to him, or She'll ignore Ren and push Kyoko to get back to the room, or she'll hang back and watch...unless Sho magically shows up in Guam at that moment.