JYJ's Jaejoong is featured in a thrilling motor cycle scene in the first video teaser for the MBC family drama Triangle. The teaser showcases Jaejoong with Lee Bum Soo and ZE:A's Siwan, as three brothers who have reunited after embarking on completely different paths in life.

Jaejoong joins the growing list of acting idols such as Kim Hyun Joong and Taecyeon, who are embracing a tougher image, as the once favored flower boy concept has started to wane in popularity. Prior to Triangle, Jaejoong starred as the uptight corporate leader Cha Mu Won in the 2011 drama Protect The Boss, followed by his performance as Kim Myung Tak in the 2012 fantasy time travel drama Dr. Jin. For his gangster role of Jang Dong-chul in Triangle, Jaejoong has mastered skills such as learning to become a casino dealer, alongside castmate Siwan.

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ZE:A's Siwan portrays Yoon Yang Ha, the privileged younger brother, who has gained the most from the brothers separating. Yoon Yang Ha maintains a harsh flower boy image, which clashes with his siblings. The role of eldest brother in the family, Jang Dong Soo, is portrayed by actor Lee Bum Soo. Lee Bum Soo most recently starred opposite Girls' Generation member YoonA in the KBS2 drama Prime Minister and I. Lee Beom Soo maintains a commanding image in Triangle, alluding to what will undoubtedly be an interesting personality dynamic between the different personalities of the brothers.

Triangle is scheduled to follow Empress Ki in the Monday-Tuesday 21:55 time slot.