Bang Chan is your ex boyfriend.As he was busy working most of the time,you started cheating on him and he knows that but he doesn't end the relationship because you are very important to him and he loves you too much.But eventually you became tired of him,the relationship wasn't going well,but it didn't stopped him from stalking you,he didn't accepted the break up,which caused him to be obsessed with you,even though you're already in another relationship,you even have a child...