According to TV Report, two couples have embarked on vacation together!

On January 4, a report went out that Choiza and Sulli went on a couple's retreat with Gaeko and his wife for the new year.  The four of them were seen leaving the country at the Incheon International Airport.  

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Witnesses at the airport stated, "Ahead of their departure for another country, Sulli and Choiza gave off a very heart-fluttering vibe," and, "There was a lot of attention on them, but they didn't notice at all and showed affection for each other."

The four of them had been unable to enjoy a break at the end of the year, so they planned a trip together for the new year.  Hope they all have fun!