Heroine, Hiromi Oka, has just entered a high school famous for its tennis club. She has started playing tennis yearning after Madam Butterfly. She was expecting to enjoy playing tennis with her best friend, Maki, but the situation changes when the new coach, Mr. Munakata, suddenly picks out Hiromi to be one of the players for the upcoming tournament and starts giving Hiromi tough lessons. She strives under any circumstance. The more the new coach gives her training, the better she seems to get. Finally she becomes the representative in the junior match tournament.

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