Hi! I’m going to repost something I wrote on the comments section (my laziness has reached new levels!) in an attempt to give you some insight on Jang Hyuk’s character (and in order to introduce the gifs I made and conceal the fact that they are absolutely random haha)
THE JUNKI I SEE
Junki was mostly bored and or repressed by his life and that’s how we see him in almost every scene. Even when he is watching soccer he has a “meh” expression, until he starts remembering Young Eun. However when he is smoking, drinking, playing rugby or making love, he comes alive as if he is releasing all that repressed energy.
He has a competitive streak that is hinted at when he is challenged by Young Eun when he couldn’t hit her with the ball. And there is his love for sports. Also I read he had been a succesful athlete. So he has all this inside of him yearning to get out. He may be also going through a midlife crisis and the anxiety that he will be a father soon and therefore will have to give up on his “youthful” dreams and do his “duty”? When he smokes you can see him suck on that cigarette with such need (it makes it seem really desirable and I am totally against smoking) Then again, this P.E teacher makes everything that is “wrong” feel desirable.
IN SUMMARY: Junki sees in Young Eun a way to escape his suffocating life, a way to release his suppressed energy and also, a way to hold on to his youth. All of this until she begins suffocating him as well…