"Jae-Hee, why do you always carry two copies of your script?" "Well, you might lose them."

That's a lie. One is for carrying around to the filming set and showing it to others. The other is. [The drama 'Youth Train' can be absorbed.] [Would you like to absorb it?] It is for my own consumption. I devour the script and make it mine alone. The story of Jae-Hee, an actor who can absorb a script 100%.

(Source: Kakaopage, translated)