Born as the second son in a family of three brothers, Kenji was always quiet and introverted in the eyes of his mother, Reiko. One spring, his older brother left home for a job, while his younger brother entered a boarding school. With their father transferred to another city for work, Kenji and Reiko were left alone together. The once lively household grew silent, and Reiko began to feel loneliness and a sense of loss. Seeing her distress, Kenji struggled with guilt over his brothers and gradually began to desire his mother's affection all to himself. The story unfolds the shifting emotions born from family bonds and the intimacy of shared solitude.