Haha, don't read spoilers then lol. I read somewhere that the way Adachi (author of H2, he even appears in every episode of the drama lol) does relationships is different than others, I forgot the exact details, but you probably already read about it lol. And Kunimi x Koga is definitely yay.
Ah, I forgot about that role lol. I didn't like her in LIAR GAME either. In Nobuta, I kept thinking it was her that was doing all the stuff lol. Now that I remember it, she did end up being cool, and I still think that ending sucked lol.