The Heavenly Demon Becomes an Idol

Read manhwa The Heavenly Demon Becomes an Idol / 천마는 아이돌이 되었다
One day, a mysterious figure dressed in martial arts attire with long hair trailing down to his waist appeared and introduced himself as “Heavenly Demon.”
I wonder how many would simply nod and accept that?
“It seems you find it hard to believe, so let me tell you again, you scoundrel—I am the Demon, Wih Wajin.”
Out of the blue, he barged into an idol agency, causing utter confusion.
So, why exactly was he here!?
“I, too, will become an idol.”