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There is a "play in the play" hidden in the animation "Research on the Present World", so what is the name of this play?

Chinese Name: Unfair Lottery ~BY2MS

English name: kujibiki imbalance t "k > J

Alias: くじびきァンバランス z) t [o \ o+2]

Official website: /bbs/simple/index.php? t266.html