Uh-oh, Han Hye Jin is watching you, Jun Hyun Moo!

The March 9 airing of MBC's 'I Live Alone' showed Jun Hyun Moo learning sports dance. The dance lesson was carried out with a female instructor who happened to be quite gorgeous. 

The studio recording for the episode took place before Jun Hyun Moon and Han Hye Jin revealed to be dating, but Han Hye Jin failed to hide her jealousy while watching the intimate scene. 

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Netizens noticed that in the studio, Han Hye Jin was trying hard to hide her anger while Jun Hyun Moo kept on checking on her.

Watch the scene yourself in the clip!