薄荷少年半心凉柚子少女半心苦
[bó hé shăo nián bàn xīn liáng yòu zi shăo nǚ bàn xīn kŭ]
Means 'The minty boy half cool and the grapefruit girl half bitter.' It portrays a boy who gives off a cool refreshing aura, while a girl has an appearance that's pleasant but her inner self may be going through hardship or suffering.