Black is a disease that spreads from person to person.
Yan Xubai's pursuit of Chen Hao's girlfriend was rejected, and he instead poured his malice on Chen Hao. Bullying, locking the toilet, stamping on the face - he infected Chen Hao with his blackness.
The victim Chen Hao tried to "fade" in the hospital, while Yan Xubai was engulfed in black and eventually fell from the rooftop.
A calico cat traveled through campus, streets and high-rise buildings, witnessing the fall of bullies, the struggles of victims, and how a disease called violence spread from person to person in the city.
Concept: Violence spreads from person to person like a disease, everyone shares it, and everyone will embark on a different path of "fading" or sinking.
