On the December 29 episode, the MCs attempted to guess the guest who was waiting behind the blinds. Monsta X's Shownu first said, "I think it's [one of the] SISTAR noonas." To this, Heechul remarked, "If it really is SISTAR, I'll just have to go home. I'm too close with them." He then asked the guest, "Have you ever been to my house?" The answer was yes, and P.O., surprised by the answer, asked the reason.
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The guest actually did turn out to be SISTAR's Bora! Heechul demanded she explain why she visited his house to the other MCs, and stirred up more curiosity as he revealed, "We spent January 1 together."
Tony An jokingly commented, "So how many days has it been since you two got together?" Bora finally explained, "This is a misunderstanding. I went there because of a show."