The story tells the end: the cake was returned to level 0, but it did not act as a signal. The chef thought the cake was returned because there was hair in it.
The little girl was fantasised (the evidence is in another film review). The purpose of designing the little girl is to design the protagonist and give her the cake. Because the truth is that the cake did not play any role in the end, a metaphor for the despair of human nature and the system. Fancy giving the cake to a little girl, saving a little girl is a kind of tenderness to this despair
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