姑娘我内心真实善良小伙我内心虚假伪装
[gū niáng wŏ nèi xīn zhēn shí shàn liáng xiăo huŏ wŏ nèi xīn xū jiă wĕi zhuāng]
The girl claims she has a pure and sincere heart whereas the boy believes he's living up an image which differs from his genuine self. It compares the authenticity between genders in one's own views.