Seo Kang Jun and Kim Hyun Joo reunited after the finale of their popular weekend drama, 'What's With This Family'!  If you recall or haven't watched the drama for some reason (highly recommended, but spoiler alert), in a complicated twist of events, Seo Kang Jun becomes the stepbrother-in-law to Kim Hyun Joo when she ties the knot with his older stepbrother in the drama.

She appeared as a guest on his SBS variety program, 'Roommate,' on March 17, even getting a ride from Seo Kang Jun, who showed his affections for his 16-year-older co-star.

SEE ALSO: Park Hyungsik returns to the small-screen in dark revenge drama 'Buried Hearts'

He said, "When I get a bit older, I want to act again with you, noona.  Not as your younger brother," suggesting he wanted to have a love line with her! 

She replied, "I'm going to work diligently.  In order not to get old," making everyone laugh.

He also said in this episode, "In the production, there weren't many scenes in which we came out together, so I was really envious of Hyungsik at the beginning of the broadcast."  Another actress from the drama, who played the three siblings' cousin, Kim Jung Nam, said, "That's why the noonas felt very bitter."

Seo Kang Jun added, "Thank you for treating me well whenever we did meet."

In addition, at the share house, Jackson showed off his beatboxing skills for Kim Hyun Joo, who was unable to close her mouth at the cool skill!  Afterwards, she learned beatboxing from him, got used to it in a short amount of time, and surprised everybody with her skills.

Jackson said in disbelief, "This doesn't make sense.  You've learned before, haven't you?" Surprised herself, she responded with, "I've discovered a new talent."