"You've found him. You found the special person. But you just missed your last opportunity to let him know."

Step into the shoes of Amy Cho, a trainee under SM Entertainment. One day, she meets Joshua, a trainee of Pledis Entertainment. Together, they form a special bond, a bond Amy could never have imagined. But when Joshua debuts before her, Amy realises she may have lost her last chance to tell him exactly what he means to her.