"丸(circle)" means the tactful person in East Asian culture.
We are all expected by our teacher or parents to be a sophisticated person from our childhood. we have Learned so many skills about how to get close to other people, or how to integrate into the group.
But I always thought It's the dark side of East Asian culture . why only the person who lives like a circle can survive and the triangle person or rectangle person be eliminated, It reminds me of the scenes at the factory like Chaplin did in Modern Times.