After raising him alone since her divorce several years earlier, Satoshi's mother is hospitalized. Her adult only son sits beside her bed, stunned by how thin and frail her hands have become. He is overwhelmed by fears about life ahead and whether he can pay for her treatment. Then his aunt Natsuko arrives to visit. Seeing her again and hearing her reassure him that everything will be all right lifts his spirits, but amid the strain of the situation, the aunt and her adult nephew begin growing unexpectedly close...