Fans of a webtoon usually start worrying the moment a K-drama adaptation is announced.
Will the casting work? Which character will disappear? Will the romance change? And, most dangerously, will the drama rewrite the ending?
It often does.
That is not necessarily because the production team misunderstood the source. A long-running webtoon and a 12- or 16-episode television drama have different clocks, different production constraints and different ways of building emotional payoff.
The more useful question is not simply, “Why did they change it?”
It is: what did the screen version need the story to do differently?
K-dramas change webtoon characters and endings because weekly comics can run for years, while television has a fixed episode order, real actors, production budgets and a deadline for narrative closure. Some changes are practical; others reflect a deliberate new interpretation.
A webtoon and a drama live on different clocks
A weekly webtoon can spend months on a side character.
It can add a new arc after reader response. It can continue long after a television production would need to deliver a finale.
A K-drama cannot.
Twelve or sixteen episodes impose a hard shape on the story. Conflict has to rise on schedule. Main relationships must develop quickly enough. A final episode has to feel like an ending even if the original webtoon is still publishing.
This alone can force major changes.
True Beauty had to finish while the source story was still alive
“True Beauty” is one of the clearest examples.
After the television series ended, screenwriter Lee Si-eun discussed the pressure of adapting a hugely popular webtoon.
She said the webtoon and the drama were different genres and that she approached the ending freely rather than simply consulting the webtoon creator for a matching final scene.
The drama needed to resolve its own version of the characters within its broadcast schedule.
That is an adaptation decision, not necessarily an act of disloyalty.
Itaewon Class proves that even the original creator may change the story
“Itaewon Class” complicates the usual fan argument because original webtoon creator Jo Gwang-jin also wrote the television adaptation.
He still made changes.
Jo described the drama as an opportunity to expand material he felt had been insufficient in the original, including character emotion and relationships.
If the person who wrote the source changes it when moving to television, the issue clearly cannot be reduced to “screenwriters disrespect webtoons.”
The medium itself changes the choices.
Mask Girl shows what compression really means
The original “Mask Girl” webtoon ran for roughly 130 episodes.
The Netflix adaptation had seven.
That is not a minor trimming exercise.
A production working at that ratio has to decide which characters carry the story, which relationships can be combined and which events deserve screen time.
Academic and industry analysis of the adaptation has noted substantial changes in characterization and relationships while retaining the source premise.
The television version is not simply a shorter copy. It reorganizes the emotional center of the story.
Actors change characters too
A webtoon creator controls a drawn character’s face, timing and physical presence.
A drama adds an actor.
Voice, body language, chemistry and star persona enter the work.
Nana, who played Kim Mo-mi in “Mask Girl,” said she deliberately avoided relying too heavily on the original webtoon because she did not want it to narrow her own interpretation of the character.
That is a creative decision only live action can produce.
Production reality matters — but it does not explain everything
A webtoon can destroy a city for the cost of drawing it.
A drama has to build, rent, shoot or digitally create that city.
Actors have schedules. Locations have restrictions. Broadcasters and streaming services have episode orders and ratings considerations.
Those realities matter.
But “budget” is sometimes used as an all-purpose explanation when a more interesting reason is available.
An adaptation may change a character because the screenwriter wants a clearer protagonist. A romance may expand because the actors’ relationship becomes central to the television version. A villain may be rewritten because seven episodes need a different dramatic engine from 130 webtoon installments.
Faithful does not always mean identical
Source readers have every right to dislike an adaptation.
A beloved scene can disappear. A character can lose what made them interesting. An ending can become safer, flatter or simply worse.
“It is a different medium” should not be used to excuse every weak rewrite.
But shot-for-panel reproduction is not automatically good adaptation either.
The strongest screen versions usually understand what readers loved about the source and then decide which parts must change so that the same emotional force works in live action.
The better comparison
When a K-drama changes a webtoon, comparing every missing scene can be fun.
There is a more revealing question.
What did the adaptation protect?
If it changed the plot but preserved the character conflict, that tells us something. If it kept famous images but changed the point of the story, that tells us something too.
The gap between webtoon and K-drama is not an error to be eliminated.
It is where adaptation becomes visible.
Sources
- Soompi — True Beauty screenwriter on adaptation and ending decisions
- Korean Film Council — Nana on approaching Mask Girl
- TIME — The rise of webtoon-based K-dramas
Dessert — two more sides of Korea
SEVENTEEN — HOT
A high-energy visual reset after the mechanics of adaptation.
Gyeongbokgung on Foot
A real Seoul setting after an article about stories moving between media.
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