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.�

SEE ALSO: Viewers note the stark difference between MAMA venues in the U.S. and Japan

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."