I ended up being asked to sing at my ex-girlfriend's wedding.

It's been several years since we broke up, and I thought I was truly over it.

At least, until I saw her becoming another man's bride.

Han Yubin. My first love and ex-girlfriend who shared every moment of my youth.

Because of one small misunderstanding, we turned our backs on each other, and I thought that was the end. I thought we would naturally forget as time passed. Both me and Yubin.

But she couldn't forget.

In fact, as time went by, the lingering regret in her heart only became clearer. In the end, Yubin chose to marry someone else just to forget me.

That man was Kang Hyun-woo.

A kind, rational, and gentle lawyer. He truly cherishes Yubin but knows nothing of her past.

He doesn't know I was Yubin's first love.

He doesn't know why we broke up.

And he doesn't know that even now, I still remain in Yubin's heart.

To Hyun-woo, I am just a reliable male friend Yubin has known for a long time.

"Since you're the friend Yubin trusts the most, I'll leave the wedding song to you."

I had no choice but to smile while hearing those words.

The bride's most intimate past standing before a groom who knows nothing.

And me, asked to sing between the two of them.

But as the wedding draws near, Yubin keeps seeking me out.

"I'm doing this because I want closure from you... If I don't, I don't think I'll ever be able to forget you."

Is she really getting married to forget me?

Or is it because she still loves me that she wants to check one last time?

Her, who has already sent out the invitations, and the man preparing for the wedding without a clue.

And me, facing her again.

The first love I thought was over begins again at the cruelest place: a wedding.

Will Yubin really be able to forget me?

And what kind of song will I end up singing at her wedding?

A wedding that should be a blessing for someone.

But for us, it was the final scene of an unfinished love.