Japanese high school student Uesugi Fuutarou has achieved excellent grades .
Japanese high school student Uesugi Fuutarou leads a difficult life otherwise : no mother , no friends , and a father struggling with large debts while Fuutarou and his younger sister Raiha often go hungry .
Japanese high school student Uesugi Fuutarou has achieved excellent grades but leads a difficult life otherwise : no mother , no friends , and a father struggling with large debts while Fuutarou and his younger sister Raiha often go hungry .