'Adam couple' Jo Kwon and Gain revealed their reunion picture.

"Fighting, Hawwah," posted Jo Kwon on his Instagram on Thursday.

In the picture, Gain is covering her eyes with her hood and is making a cute face. Next to her is Jo Kwon, making a blank look at the camera.

The two had been a virtual couple on MBC "We Got Married" season 2 from 2009 to 2011, receiving much love and popularity as the 'adam couple.'

Gain released her fourth album Hawwah last Thursday.