Webtoons have become one of Korea’s most dependable sources of entertainment IP, feeding studios a steady stream of stories with built-in fanbases and proven popularity. Over the past few years, filmmakers and streaming platforms have leaned heavily into webtoon-based projects as a way to lower risk—especially in a market where audiences have endless content choices.
But as more adaptations flood theaters and streaming services, one reality has become increasingly clear: a successful webtoon alone doesn’t guarantee a successful show or movie. The projects that thrive tend to respect the original’s appeal while adapting it thoughtfully for a new format. The ones that stumble often prove that even massive budgets can’t save a story that doesn’t translate well on screen.
The Big Wins: When Webtoon Stories Translate Smoothly
One of the most surprising success stories of 2025 came from My Daughter Is a Zombie, a film produced by Naver Webtoon’s video production subsidiary Studio N. Based on Lee Yun-chang’s 2018 webtoon, the movie drew over 5.6 million viewers, making it the most-watched Korean film release of the year. Its strength came from its balance of tone—pairing dark humor with a genuinely emotional story about family and devotion in the middle of chaos.
Netflix also scored major wins by staying closer to the spirit of its source material. The Trauma Code: Heroes on Call, starring Ju Ji-hoon, became a breakout hit and earned praise for its intense medical realism and fast-paced storytelling. The series originated from the web novel Trauma Center: Golden Hour by Hansanleega, which later became a Naver Webtoon.
Meanwhile, Weak Hero Class 2 expanded the franchise’s reach even further, landing in Netflix Top 10 lists across more than 60 countries. The series stood out not only for its action sequences, but also for raising the psychological and emotional stakes that made the original webtoon resonate with readers.
Even traditional broadcast TV continued to benefit from webtoon IP power. SBS’ Taxi Driver maintained its momentum into Season 3, showing that webtoon-based adaptations can sustain long-term popularity—when the formula stays fresh and the execution stays strong.
The Misses: Big Budgets Don’t Automatically Create Big Hits
At the same time, 2025 also highlighted how fragile the webtoon adaptation “formula” can be when a production fails to capture what made the original compelling.
One of the most talked-about disappointments was the live-action film adaptation of Omniscient Reader. Despite a reported production budget of over 30 billion won (approximately $21.7 million USD) and a star-studded cast, the movie struggled to connect with broader audiences. While it opened at No. 1, it reportedly stalled around 1 million admissions, far below its break-even point.
Many fans and critics pointed to the same issue: the original story’s world-building is massive, complex, and layered. Trying to compress that scale into a single two-hour film created a version that felt confusing to new viewers—and too shallow for longtime fans.
Netflix’s action-noir Mercy for None, starring So Ji-sub, also drew mixed reactions. While it pulled strong early viewership, many readers criticized the adaptation for smoothing out the darker tone of the webtoon and leaning into familiar action tropes instead.
Channel A’s The Witch, based on Kang Full’s popular webtoon, also struggled to maintain momentum. Despite a promising start, the drama peaked at a 3.1% viewership rating, with many viewers feeling its slow-burn pacing didn’t match the high-speed storytelling style modern K-Drama audiences now expect.
The Bottom Line: Webtoon IP Is Powerful—But Only When Adapted With Intention
Webtoons continue to dominate the entertainment pipeline because they offer what studios want most: strong concepts, built-in audiences, and stories already tested in the market. But 2025 proved that webtoon-based success isn’t automatic.
In a crowded era of K-Content, producers can’t rely on a famous title alone. The most successful adaptations don’t just copy panels—they find the right “visual grammar” to transform webtoon imagination into something cinematic, compelling, and emotionally effective.
As Studio N CEO Kwon Mi-kyung has previously emphasized, the key isn’t just having a strong story—it’s translating it in a way that works for the screen.
Source: Korea Times
