深巷旧年少女依旧独守孤城凉城往事少年依然孤身一人
[shēn xiàng jiù nián shăo nǚ yī jiù dú shŏu gū chéng liáng chéng wăng shì shăo nián yī rán gū shēn yī rén]
It paints a poetic and somewhat melancholic picture. 'In the deep lane of old times, the girl still guards her lonely city while past stories mean the boy remains alone forever.' Both characters face solitude.