nǐ qíng wǒ yuàn
to both be willing
mutual consent
你
nǐ
you (Note: In Taiwan, 妳 is used to address females, but in mainland China, it is not commonly used. Instead, 你 is used to address both males and females.)
情
qíng
(bound form) feelings; emotion; sentiment; passion
我
wǒ
I; me; my
愿
yuàn
(bound form) wish; hope; desire