凉薄少年空城爱深巷少女以离去
[liáng bó shăo nián kōng chéng ài shēn xiàng shăo nǚ yĭ lí qù]
Describes the fleeting but profound love between an indifferent (cold) young boy living in an empty city and a girl in the alleyway, ending with her departure. It evokes imagery of unrequited or lost love under unique circumstances.