OFF+GUN "didn't know it would be you"

Off has always been a boy who attracts all the girls at his school, he has always been a player.
Going to one girl to another, his relationships with a girl never lasted more than a week if not less.

But who is underneath this playboy, who is he when nobody sees?

When Off meets Gun will he change only for him, or will he continue to play around with all the girls at the school?

Is Gun the one who is going to see what kind of person off is, is it real love? or is Off only playing with Gun?

Gun is a sweet boy who can't stand people like Off but how can he then fall in love with one of those people?