OMG, NO WONDER IT WAS SO FAMILIAR- I JUST REALIZED IN CHAPTER 49 THAT THE ARTSTYLE IS THE SAME AS THE WEBTOON 'IT'S MINE". In Chap 49, look at the eyes really closelY. I'm so dumbfounded that I only realized it just now, it was familiar but couldn't recognize where it was from T_T
I Used to be a Boss