On July 9, MBC released the first teaser for A Bona Fide Killer, a highly anticipated drama based on the hit webtoon of the same name. The action-romance series follows Yoo Bo Na (played by Gong Hyo Jin), who appears to be an ordinary working mother but secretly lives a double life as a legendary sniper known as Kingfisher.
Shortly after the teaser’s release, online discussions quickly centered on Jung Joon Won, who plays Yoo Bo Na’s husband, Kwon Tae Sung. In the original webtoon, Kwon Tae Sung is portrayed as an exceptionally handsome man with impeccable manners. His striking appearance is a key plot point, as Yoo Bo Na falls in love with him at first sight.
Some fans argued that Jung Joon Won does not match the glamorous visual image established in the comic. “His acting isn’t the issue, but he doesn’t quite fit the role physically,” one netizen noted. Others defended the casting, commenting, “After watching the teaser, his gentle and warm image actually suits the character,” and “Acting ability matters much more than visual resemblance.” The debate continues to divide webtoon readers and K-drama viewers alike.
This is far from the first time a webtoon adaptation has faced intense casting controversy. One of the best-known examples is Kim Go Eun in tvN’s 2016 drama Cheese in the Trap. Because the original webtoon had such a devoted fanbase, casting decisions were scrutinized so heavily that the term “Cheese Mother” (a play on the drama’s title and the Korean word for a critical mother-in-law) was coined to describe overly protective fans.
When Kim Go Eun was cast as Hong Seol, many criticized her for lacking a visual resemblance to the original character. However, public opinion shifted dramatically once the drama premiered. Kim Go Eun won widespread praise for bringing warmth, realism, and emotional depth to Hong Seol, creating a fresh interpretation of the beloved heroine. The series debuted with a 3.6% nationwide rating before peaking at 5.4%, while consistently dominating TV buzz rankings.
More recently, Choo Young Woo faced similar criticism after being cast as Jae Won in the film adaptation of Even If This Love Disappears from the World Tonight, which was released last December. In the original novel, Jae Won is a frail, terminally ill young man suffering from heart disease. By contrast, Choo Young Woo’s healthy and athletic physique led many fans to question the casting based solely on promotional stills.
Despite the initial backlash, Choo Young Woo delivered a nuanced performance that perfectly captured the character’s inner sorrow and emotional struggles, earning widespread praise from audiences. The film ultimately attracted 860,000 moviegoers, comfortably surpassing its break-even point to become a major commercial success.
As Kim Go Eun and Choo Young Woo have demonstrated, a perfect visual resemblance to the source material is not the only ingredient for success. When an actor brings a strong interpretation and a convincing performance to a role, a character can become even more vivid than the original version.
Now, all eyes are on Jung Joon Won to see whether he can achieve the same turnaround and transform initial skepticism into a career-defining performance.
