The November 3 airing of 'Kim Chang Ryul's Old School' featured f(x)'s Amber and Krystal chattering on with Kangin, the special DJ substituting for Kim Chang Ryul.  

When Kangin noticed that there were two of the members were missing, he said, "Where are the rest of the members?" Amber replied, "Victoria has promotions in China and Luna is busy with her musical," and joked, "We only see each once a month. When we do, we are like, 'Who are you?'" 

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During their talk, Kangin directed a question at Amber, mentioning the phrase "Forget it," which she had uttered on MBC's 'Real Men.' He was curious about what Amber meant to forget, but Amber mused that she didn't even realize she said it that way. 

She explained, "I think because I found myself wanting to cry all the time, I wanted to say to forget that side of me," implying that she did not want people to remember her hard times on 'Real Men.'