柠檬与少年亦清凉如夏橙子与少女亦朦胧如春
[níng méng yŭ shăo nián yì qīng liáng rú xià chéng zi yŭ shăo nǚ yì méng lóng rú chūn]
Translates as 'Just like lemon and boy are refreshing in the summer, tangerine and girl are dreamy in spring.' This implies youthful relationships as fresh and sweet as lemons and tangerines during the right seasons.