蓝颜就是有着男朋友的义务
[lán yán jiù shì yŏu zhe nán péng yŏu de yì wù]
In Chinese internet slang, 'Blue Face' often refers to a close but non-romantic male friend, similar to 'zhen', meaning someone like family for girls/women. Here, adding obligations of a boyfriend suggests this is a very caring guy friend who fulfills all responsibilities a lover should do without romantic involvement.