While investigating a series of serial cases of artists who enjoyed "delivering extreme emotions", she met a strange woman. There was no "emotional color" flowing around this woman, and she was absolutely transparent - something Xie Li had never seen before. What's even stranger is that when this woman smiled at her, Xie Li understood the meaning of an expression for the first time with the movement of her facial features.
Concept: A person who understands emotions by "cheating" (looking at colors), and a person who is so "pure" (no external emotional colors) that she must relearn how to "read" instinctively. Transparency, is it nothingness, or does it contain the starting point of all colors?