Living in Tokyo, Satoru headed to the home of his grandmother, Natsume, in Tsukuba, intending to convince her to move in with him in the city. However, Natsume strongly wished to spend the rest of her life in her own home, leaving Satoru conflicted as he witnessed her determination. He also learned that land developers were targeting her property, prompting him to struggle desperately to protect her. As Natsume observed Satoru's efforts over an extended period, her feelings gradually evolved beyond the normal bond between grandmother and grandson...