同桌是丑女后面是男神
[tóng zhuō shì chŏu nǚ hòu miàn shì nán shén]
'My desk mate is plain-looking, and the guy at my back is god-like.' Reflects on high school experience. It's comparing two classmates: one is ordinary and unappealing (deskmate), while the other seems perfect (guy behind).