When everyone turns 14 they are assigned a guardian. Guardians are either Angels, Demons, fallen Angel's. Fallen Angel's are the rarest while normal Angel's are the most common.

Today it was your 14th Birthday so you were assigned your guardian. You had gotten a Fallen Angel like your mother had. Your guardians name was Minho.

Minho: "call my name whenever you need me, alright?"

His voice is pretty stern but has a hint of care.