Sex is Zero

At Sunjong University, a handful of students are dedicated, such as Eun-hyo, who diligently practices aerobics with the goal of excelling in a national competition. However, the majority of students are more interested in leisure activities, indulging in drinking, partying, and pursuing romantic interests. Eun-shik, a law student and military veteran, is older but struggles with social skills. He has feelings for Eun-hyo, and while she is drawn to his sincere and straightforward nature, his immature antics make him less appealing when Sung-ok, an attractive and wealthy student, captures her attention. Eun-hyo and Sung-ok start a relationship, leaving Eun-shik on the periphery. As the national competition nears, complications ensue.