柠檬酸不了我的心只有你
[níng méng suān bù le wŏ de xīn zhĭ yŏu nĭ]
'Ningmeng Su Bu Liao Wo De Xin Zhi You Ni' means 'The lemon can't make my heart sour; only you do.' The owner feels that only their love interest has the power to truly affect their heart, unlike lemons which are typically sour.