After Krystal went out of her dorm and left,the first person to enter the CEO's office is Heechul. At first when he walked in all that he could think of was "Where is the CEO?" when he walked to the table he saw the letter he was going to open the letter but then......SM's CEO walked in and asked what is the letter for."I don't know" Heechul answered.

The CEO opened the letter and found that Krystal is resigning! He told Heechul,Heechul was shocked  and immediately went to find Ryeowook and told him that Krystal is resigning.Ryeowook then said "What the?! You are kidding right?" Heechul said "No!". Ryeowook then began to feel guilty.

He was thinking was it his fault that Krystal didn't want to be part of SM anymore. so he went to f(x)'s dorm and told them the sad news and they were devastated~ Sulli then remembered what happened in the morning.While Ryeowook was searching for clues to where Krystal migh be going,He found the letter that she left.He read it and felt very guilty.Sulli told everyone what happened that morning,everyone cried execpt for Ryeowook.