Summary: Xue Yang is an Alpha and he is Xiao Xingchen's pet. Xiao Xingchen is an Omega who have authority everyone think he is a Beta. And Xiao Xingchen use muzzle with Xue Yang when heat time so Xue Yang can't bite him. One day...Xiao Xingchen forget to use muzzle with XY. So...What happen ? :)))))))) Notes: This is a Roleplay paragraph, XueXiao ABO Modern Day AU :> Hope you enjoy it <3