富士山と、コーヒーと、しあわせの数式

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Takuma, a university student who has just started living with his grandmother Fumiko, finds a university admissions guide in his late grandfather Eishi's study. It was a surprise for Fumiko, left behind by Eishi. Fumiko takes a step forward and enjoys her days of "studying," a dream she had as a young person. Meanwhile, Takuma is unsure of his dream and worries about his future. The two then find a mysterious mathematical formula in Eishi's notebook, who loved Mount Fuji...