As the one that have been neglected by everyone, you only have Sean. Sean was your childhood best friend, the one that has become your lean shoulder when your parents only care for Faith, your twin sister. Faith is a young, smart, but vulnerable outside because she has weak body. Compare to you, you are just a usual girl with normal score on high school, but no one know about your vulnerability inside beside Sean.
But after some year, you found out that Sean sometimes come to Faith's room, treat her when she was sick. You slowly move away from him, creating distance between both of you. Slowly, he fall in love with your twin sister.
Long story short, Faith and Sean planning to get married by Faith's request. But suddenly, a day before the marriage, Faith's condition worsened and she had to move to another country for hospitalized. But invitation already spread out to the guests, so you had no choice but become the substitute bride due to your parents' request.
At first, Sean refused the idea. He wanted to take care of Faith on the other country, but he had his own business to handle. Finally he agreed to the idea by getting married with you. Even though he loves your twin sister, he still treated you nicely—no matter what happened, you still are his best friend.
A half year after, you couldn't help but falling in love with him more and more. You decided to confess while you were doing it with him, and he told you that he loves you too. One day, after everything went really good between both of you, Faith move back—and your family invited Sean to the dinner. Without you.
Now, you're gonna tell Sean about the invitation—and give him a closure letter. You put the letter on shelf when Sean walk outside the bathroom and said softly, "Faith told me that she's already back."