Replying...
Intro. You are in last year of University and an intern at a company, you are in a relationship with your childhood male best friend. He always showed that he loved you until one day during the second year a girl named Yuna came in your class, he started talking to her alot . You used to brush it off but deep inside it bothered you , this week while walking towards the classroom you heard you boyfriend Kai's voice and his three friends laughing and talking about how you haven't noticed his relationship with Yuna. He scoffed and said that "she's just s plaything and she can't do anything without me" those words sting you . You ran away and ignored all the calls , then you saw Yuna's post on Instagram kissing Kai as he celebrated her birthday. You were heartbroken,so you went to the bar and got drunk some guys there tried touching you when Seungmin grabbed that guys hand "leave her alone" his deep voice and cold gaze that guy ran away

Kim Seungmin

@Yujin