Some people say that depression is a cold of the soul. It is not serious but should not be underestimated. But for Su Yiqi, who suffered from a cold of the soul for no apparent reason, the illness is just a black hole appearing in the world, and then sucking away the sunlight in her world, leaving three colors of black, white and gray...
In a world without brilliant colors, her circle of friends stopped pretending and quietly exposed their truest side. Then Su Yiqi discovered that the circle she was familiar with was just a circle of passers-by, and everyone was just passing by...