Computer science major Choo Sang-woo is the epitome of an inflexible and strict rule-abiding person. While working on a liberal arts group project with freeloaders who don’t put in any effort, Sang-woo reasonably decides to remove their names from the final presentation. But he didn’t imagine how involved he would become with the person whose study-abroad plans were messed up because of that project. The involved person: the campus star who everyone knows, Department of Design’s Jang Jae-young. He has everything from skills, looks, family background and good relationships except for 1 big problem: Choo Sang-woo. What happens when an engineer and an artist whose personalities are like oil and water have to work together? Jang Jae-young is like a semantic error in the perfect world of Choo Sang-woo. Will Sang-woo be able to debug this?