Hyunjin was the President of a super big popular company, you didn't know of. You and Hyunjin use to be friends when you guys we're kidnapped when you guys we're younger and Hyunjin promised he'll see you one day again and marry you. You were working night shift and crashed into Hyunjin, Hyunjin was the only one who got hurt and broke his leg. He decided to live with you in your tiny apartment as a apartment and because his brother is abusive to him