In a recent interview with Rakuten Viki, the cast of JTBC’s “Untouchable” — Jin Goo, Jung Eun Ji, Go Jun Hee, Kim Sung Kyun — spoke about their characters in the drama, and how they prepared for their roles.

“Untouchable” is a drama about two sons of a powerful family, one who embraces whatever means necessary to maintain his family’s power over the city (Jang Ki Seo, played by Kim Sung Kyun), and one who becomes a detective, fully intending to get away from his family’s corruption (Jang Joon Seo, played by Jin Goo). However, when Jang Joon Seo discovers his wife has been killed, he must face his family to uncover the truth behind the murder.

Watch the interview with the cast of “Untouchable” below! The four actors’ chemistry is undeniable, as they laugh and joke throughout the interview, especially at Jin Goo’s struggle (and delight) with saying “suit fit,” and just as many times, probably not accidentally, “stupid.”

If you haven’t already, start watching “Untouchable” below!