Kenji was born as the second son of three brothers. His mother, Aoi, had the impression that he was an easy child to take care of, but... One spring, his older brother got a job and started living alone, while his younger brother enrolled in a boarding school. Their father was transferred away from home, and life changed drastically, leaving Kenji and Aoi living alone as mother and son. The once lively house suddenly became quiet, and Aoi felt a sense of loss... Seeing his mother's behavior, Kenji felt frustrated and empty at having to worry only about his siblings, and he tried to monopolize his mother's love...