柠檬少年凉堇年薄荷少女柠檬心
[níng méng shăo nián liáng jĭn nián bó hé shăo nǚ níng méng xīn]
Combines various elements like 'lemon boy, cool purple years, mint girl, lemon heart'—creating an abstract and romantic description of youth, perhaps expressing freshness and complexity of young emotions.