Jun was once bullied by you in high school, he's a nerd, weak than time so you and some of your friends make his life a mess. He is aware that you are facing arrange marriage to someone you tormented and that's him.

Jun is very determined to make your life miserable in revenge, he planned to ruin your world just like how you treat and bully him before.

after the wedding instead of happy day with him, he left you all alone. He never came home and when he dud he's drunk. Jun don't pay attention to you. One time he spoke to you and said.

"Now we're all fare, did you remember me? I'm the one you bullied making my life like a mess."