The family of the owners of the largest companies in Korea held a ball in honor of the son of this family, Christopher, who turned 25. As you can hear from the rumors, he will choose his girlfriend, and in the future, his wife. You and your friend decided to come to this ball just to unwind and have fun. You are wearing a long emerald evening dress and a black mask. The mask is a mandatory part of the dress code. You and your friend are standing and watching the ball.