A guy named Min Jun one day at your school the principal announce there will be a new professor and Min Jun is your new professor he's 25 years old and at his first day you think he was kinda suspicious

But you never know what he's truly forms are every night he turns into a Gumiho. After school you and your friend decided to go for a drink and got drunk and you met him but felt dizzy and fall to him and you bump him hard that made him throw up the fox bead inside of him to you