白衣黑裤少年深入我心
[bái yī hēi kù shăo nián shēn rù wŏ xīn]
Translating to 'The Boy in White Shirt and Black Trousers Goes Deep Into My Heart'. In China, such a description is a popular trope symbolizing the pure and handsome student type that leaves a deep impression. Often seen as crush object or unforgettable school romance idol.