Probably he went into rut
Liu is a ghost alpha. Every time he knots with a beta, his body releases chemicals that gradually transform the beta into an omega; this process is called changing. After knotting, a ghost alpha's pupils constrict and their irises turn grayish, giving their eyes a ghostly appearance—hence the name ghost alpha. Liu knows this, which is why he wears glasses to hide the fact that he's a ghost from Yeehyeon and everyone else. Ghost alphas are mythical; there are very few records of them, and in ancient times they were used to create perfect omegas and sell them to wealthy families. Liu's family has always protected him so that no one finds out what he is and uses him.
Wow
Guys I was like why was he wearing glasses at night ??? his eyes are gray what
Does this mean ????