Koharu, a flamboyant geisha, unexpectedly wins a trip to Sado Island in a TV contest. She is accompanied by three people. Koharu had been dreaming of a handsome young man, but when she gets into the first-class car, she meets Tashiro, a pretentious young man with rimless glasses, Sugimura, who has a mean look in his eyes, and Ryuta, a young man she had a scuffle with in a boxing match the other day and hated. After countless misunderstandings, Koharu vows to defeat Tomoe-gumi's leader, Yamada's gang...

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