Semantic Error

One deleted name on a group project slide, and a whole semester goes sideways. Semantic Error (시맨틱 에러) is the 2022 Watcha Original that turns a campus revenge plot into a slow romance, starring Park Jae-chan and Park Seo-ham.

Choo Sang-woo studies computer science and lives like a well commented program: fixed routines, no wasted words, no exceptions. When his liberal arts group project ends with teammates who did nothing, he applies the only logic he trusts and removes their names from the final presentation. Fair is fair.

One of those names belongs to Jang Jae-young, a senior from the Department of Design. He is loud where Sang-woo is quiet, popular where Sang-woo walks alone, and the cut costs him far more than a grade, because his plans to study abroad fall apart with it. Jae-young does not file a complaint. He vows revenge, and his revenge is persistence.

So the design senior starts turning up everywhere in Sang-woo's carefully ordered days. He interrupts routines, tests boundaries and keeps score. Sang-woo tries to regain control, then tries to negotiate, and slowly discovers that this particular disruption refuses to be debugged. Their friends Ji-hye, Dong-gun and Yu-na watch from the sidelines as a feud built on spite starts behaving like something else entirely. The question at the heart of the eight short episodes is simple: what happens when a person who runs on rules meets the one variable he cannot predict?