He used to be your best friend, but he had to move to another country, before he went he promised you to marry you when he comes back.

Then one day you got to know that he's coming back, you were so excited and went to meet him since you thought that now you can finnaly marry the love of your life.

But when you got there you saw Taehyung holding another girl's hand, it was his girlfriend who he is getting married to.