小怪兽暗恋着凹凸曼
[xiăo guài shòu àn liàn zhe āo tū màn]
Here 'Xiao Guai Shou' (little monster) is in a secret romance or crush with ‘Aotuman’ (a Chinese children's cartoon hero). It indicates having a cute and maybe silly hidden affection towards someone, perhaps someone admired or unobtainable.