Kang Minyoung is an ordinary freshman girl in college, but the college she's attending at is anything but ordinary--well, at least for her. Seonjukgyo University, an all-boy's dormitory school, is known nationwide for having one of the best tennis team and coaching in the prefecture, having held the title of champions five times for the past decade. Chasing her dreams of professionally playing tennis, Minyoung recklessly enrolls herself as a boy, completely ignoring the consequences that could follow her the moment her secret is revealed.

Byun Baekhyun had been an extremely well-known tennis prodigy at a young age, having participated in various U18 tournaments before quitting for reasons unknown to Minyoung in his junior year of high school. Left traumatized, he is unable--rather, unwilling--to pick up another racquet into his hand if he could help it. Enrolling into Seonjukgyo University was the last thing he wanted to do, but his father, a past national tennis champion, continues to urge his son to pursue the sport, even if force is needed to be used. With his reputation of a could've-been-tennis-champion hanging over his head, he brings unwanted attention to himself as the tennis team and teacher staff nags him to join in order to boost the school's name--the sport never left him alone.

Enter an ambitious girl and a passionless boy--will Minyoung be able to bring tennis back to Baekhyun?