听说深爱是场谋杀我是间谍我保护你
[tīng shuō shēn ài shì chăng móu shā wŏ shì jiān dié wŏ băo hù nĭ]
It means 'I heard that deep love is a murder, I am a spy and I will protect you.' This indicates the person's willingness to deeply love someone in an intense or protective way, like being willing to put themselves at great risk. In a romantic sense, it represents the selfless dedication of one lover to the other.