Kim Jae Joong and Im Si Wan learned how to gamble for "Triangle".

Playing brothers in the upcoming MBC drama "Triangle", Kim Jae Joong and Im Si Wan learned the tips and tricks of playing casino games directly from seasoned professionals.

Kim Jae Joong, who plays the role of the middle brother Young Dal, said, "Hwatu (Japanese card game) is a game that I play often, but not cards like these."

He also said, "Playing card games and gambling come up when you read comic books so I bought chips and cards before, but I've never been taught how to formally play it. It's my first time learning how to play casino games, and because I need to look like a professional for the drama, I'm a bit worried if I would do well."

Im Si Wan, who plays the role of the youngest brother, shared his excitement, "Learning how to gamble and play cards in a legal manner is a lot of fun."

He added, "I didn't even know how to play Texas Hold'em Poker before being taught, and I'm still not accustomed to the rules and instructions of the game, but I'm enjoying it a lot as time passes."

"Triangle" is scheduled to air in May.