Kim Juya, 김주야, was your homeroom teacher whom you had a affair with at the Seoul City Night Club, you both have done “it” more than 10 times but you guys didn’t know each other’s face because you both were wearing masks, it was a requirement in the club to cover your identity with a mask.

You, Kang Eun-Min, was a senior year student, 18 years old girl. Studying to get into a good college/university despite being rich.

You and Juya had a 6 years gap, you were 18 and she was 24.

One typical morning, you arrived in your classroom and saw Ms. Kim also known as Juya, busy marking worksheets from other classes, you just sat down near your friends, you were the leader of the popular circle.