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On the March 30 episode of 'I Live Alone', the 'Rainbow Team' got on the airplane to go to the Catalina Islands with an invitation from Daniel Henney. (The filming for this episode took place before the couple went public with their relationship.)

But en route, the cameras caught something suspicious. Jun Hyun Moo and Han Hye Jin were both busily texting at the same time, and later on, it was revealed that the two had been texting none other than, each other!

Watching those two text away, the other members of the 'Rainbow Team' expressed that they felt humorously fooled by the couple, who had been sneaky throughout the entire plane ride. "It's like they were sending 'Morse codes' to each other!" yelled Park Na Rae. Instead of physically talking, they had been sending secret messages, only stealing each other's glances from time to time.

Last month in February, Jun Hyun Moo and Han Hye Jin admitted that they were dating in real life. Check out the full clip above to see what went on during the plane ride!