"Adamas" delivered a mind-boggling series as Ji Sung portrayed an interesting character alongside Seo Ji Hye.

Taking on the role of twin brothers Ha Woo Shin and Song Soo Hyun, one of their missions is to figure out the mystery behind the adamas and uncover the truth behind their father's involvement in the murder case that happened 22 years ago.

In the story, the mystery revolves around Haesong Group Chairman Kwon Jae Kyu and the hidden secret behind the weapon adamas.

As the twin brothers solve the mystery, he is joined by his secret allies. It includes Kwon Jae Kyu's daughter-in-law, Eun Hye Soo, played by Seo Ji Hye; investigative reporter Kim Seo Hee, played by Lee Soo Kyung; and Haesong's general manager of security, Choi Tae Sung, played by Heo Sung Tae.

After the tvN series wrapped up the season, let's get to know more about the "Adamas" cast, Ji Sung, Seo Ji Hye, and more, a year after airing its finale episode.

Ji Sung

The South Korean top star never fails to amaze viewers with his acting spectrum, this time taking on a dual role in "Adamas."

During the drama's press conference, director Park Seung Woo praised Ji Sung for delivering great work.

"I would praise Ji Sung every minute and every hour. He reads my mind. He's very smart, and it was great for me to work with him and rely on him," the filmmaker said, as obtained by a media outlet.

IN CASE YOU MISSED: Ji Sung Reveals Why It's Challenging to Play Dual Role in 'Adamas'

While "Adamas" is his last K-drama project, Ji Sung's wife, Lee Bo Young, surprised viewers with the actor's hidden talent. It seemed like the prolific star had started a new hobby as the actress posted Ji Sung's first ever painting, which turned out to be a portrait of her.

Seo Ji Hye

Best known for her role as the member of an elite family in North Korea in "Crash Landing on You," Seo Ji Hye once again proved her talent by landing the mysterious character in "Adamas."

After the tvN series, she headlined the comedy-life series "Red Balloon" with Lee Sang Woo, Hong Soo Hyun, and Lee Sung Jae.

As for his upcoming project, she will be part of the highly anticipated K-drama Younger," a remake of the American TV series of the same name.

Lee Soo Kyung

Joining this list is none other than Lee Soo Kyung, who had her first ever lead role through "Adamas."

Interestingly, she is among the supporting cast members who will be part of the much-awaited K-drama "You Have Done Well," which stars Park Bo Gum and IU.

Viewers will get to see Lee Soo Kyung with the duo as the drama airs in 2025.

READ MORE: K-Drama Actors Who Recently Returned With Unsuccessful Projects: Gong Yoo, Lee Dong Wook

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Written by Geca Wills