Sports Rehabilitation Department, former soccer player Shin Seung-won and business administration model student Kwon Jae-yoon's campus romance - Business Administration Department Kwon Jae-yoon has surgery for tinnitus in his left ear and returns to campus a year later, where he encounters Shin Seung-won, whom he had a crush on five years ago. Before he can even get over his bewilderment, Jae-yoon's heart wavers endlessly when Seung-won approaches him without hesitation while taking the same class. When Seung- won takes Jae-yoon home every night after he hurts his leg, Jae-yoon, who is uncomfortable with this one-sided favor, decides to help Seung-won with his sports rehabilitation department class practice... Unlike his head, which he tries to ignore as much as possible, his body keeps reacting instinctively, and Jae-yoon is worried that he might be misunderstood as a pervert.