The "error" enters his life in the form of , a talented, free-spirited design major. Jae-young is everything Sang-woo is not: chaotic, emotional, and social. He is a "semantic error" in Sang-woo’s perfectly coded reality. The Conflict
: Jae-young decides to torment Sang-woo, not through violence, but by disrupting his carefully curated routine—showing up in his favorite "unoccupied" spots and wearing the color red, which Sang-woo hates. Semantic Error
The story follows , an uncompromising, logic-driven computer science student who lives his life by a rigid set of rules. For Sang-woo, the world is binary—efficient or inefficient, correct or incorrect. The "error" enters his life in the form