后巷的猫街少女后巷的涂鸦少年
[hòu xiàng de māo jiē shăo nǚ hòu xiàng de tú yā shăo nián]
Describing young people living in back alleys, with an element of mystery or street culture. It suggests lives that may go unnoticed yet are vibrant and rich with their unique stories and expressions.