Ace wo Nerae! (1979)  

Aim for the Ace!: The Movie

A high school freshman named Hiromi joins the tennis club due to her admiration for Ryuzaki, who is a senior and considered the best player on the team. Additionally, Ryuzaki has earned the nickname "Ochoufujin," which means "Madame Butterfly" because of her graceful style while playing tennis. However, their new coach, Jin Munakata, wants Hiromi to participate in an upcoming tournament despite her lack of experience. This leads Hiromi to consider quitting tennis altogether but ultimately realizes that she loves the sport and decides to stay with it. Under Munakatas guidance, Hiromis talent begins to flourish. Unfortunately, Munakata is unaware that he has a life-threatening illness and continues to coach despite his condition.