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name an actor/actress
next poster names what dorama that actor/actress has been in, then they name another actor/actress from the dorama they mentioned
next poster names what dorama the actor/actress has been in, then they name another actor/actress from the dorama they mentioned
etc....

to make it simple let me give an example

1st poster: horikita maki
next poster: tokujo kabachi, sakurai sho
next poster: yamamoto taro monogatari, kazunari ninomiya
etc.....
get it?
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I'll start;

Kamenashi Kazuya

Dragon Zakura, Yamashita Tomohisa

Liar Game, Shota Matsuda