你是我的小怪兽我是你的凹凸曼
[nĭ shì wŏ de xiăo guài shòu wŏ shì nĭ de āo tū màn]
It means ‘You are my little monster, I am your AoTouMan (an equivalent hero figure from Chinese media)’. This implies playful mutual possession and care between close friends or lovers: the 'monster' suggests a unique beloved one and 'AoTouMan' symbolizes being someone’s hero who will protect them