The title says it all. First, you post something that a KH character would never say, like this:
Marluxia: Flowers? Soooo flamboyant! Give me the concrete jungle any day!
The next person that posts will have to use the ending word or phrase of the last post:
Sora: Day or night- it makes no difference to me. My life is a never ending cycle of tears and darkness.
You can change the word or phrase a little bit, but it must have the same basic meaning.
I'll start it off:
Larxene: I feel pretty, oh so pretty, I feel pretty and witty and gay!
(Note: I didn't come up with the idea.
This person did.)