As the Netflix K-drama "A Killer Paradox" gained favorable responses from viewers, lead star Son Seok Koo is once again getting attention - not just for his acting, but also for his uncanny resemblance to his co-star!

Officially premiering on February 9, the streaming platform introduced a webtoon-based K-drama that depicts the story of a college student who unexpectedly becomes a killer.

Lee Tang, played by Choi Woo Shik, is an ordinary college student. To support his studies, he works part-time at a convenience store at night. However, an incident changes his life after he accidentally kills a customer who happens to be a serial killer.

Amid his guilt and fear, he realizes that he has the ability to identify bad people and soon became a dark hero. With his new mission, he is being chased by Jang Nam Gam, played by Son Seok Koo, a charismatic yet cold-blooded detective.

Interestingly, other than the drama's entertaining plot and amazing cast lineup, what struck viewers was Son Seok Koo's doppelganger.

Meet Son Seok Koo's Doppelganger in 'A Killer Paradox'

On Twitter, netizens can't help but gush over a post containing Son Seok Koo's photo along with a child actor who showed similarities with the lead star.

Currently raking in 6.5 million views and counting, the post featured a side-by-side photo of award-winning star and rookie actor Kang Jee Seok.

Boasting identical features, he played the young Jang Nan Gam, appearing in episodes 7 and 8.

Kang Jee Seok appeared as the middle school version of Jang Nan Gam, which made viewers confused and, at the same time, surprised with their resemblance.

Netizens also expressed their disbelief in an online community where viewers mentioned that the young actor looked like an AI version of Son Seok Koo.

Others even thought that the child actor might be Son Seok Koo's relative.

Kang Jee Seok has played the young version of various stars in different K-dramas. Viewers might recognize him as the young Bae Yoo Ram in "The Kings of Pigs" and Notak in Arthdal Chronicles: The Sword of Aramun."

'A Killer Paradox' Ranks 4th in Netflix's Top 10 TV Shows

With less than a week since the webtoon-based K-drama aired, "A Killer Paradox" climbed to 4th place in Netflix's global top 10 TV shows.

As cited by Flix Patrol, Son Seok Koo and Choi Woo Shik's drama took first place in one country, which includes India, Indonesia, Malaysia, Pakistan, the Philippines, Qatar, Singapore, South Korea, Thailand, and Vietnam.

Apart from the Netflix top 10 TV shows, "A Killer Paradox" also received positive reviews on Rotten Tomatoes, garnering 100 percent in the tomato meter and 82 percent in the audience score.

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Written by Geca Wills