Interesting, never seen it until now.
In the video it also appeared in the title of a book: 硝子の塔のなんとか 
Yep, exactly my impression. I guess we need you to read them now, in order to find out 
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Interesting, never seen it until now.
In the video it also appeared in the title of a book: 硝子の塔のなんとか
Yep, exactly my impression. I guess we need you to read them now, in order to find out