Seiji was born the second son of three brothers. From her mother's point of view, I had the impression that she was an untouchable child. In the spring of one year, my older brother got a job and lived alone, and my younger brother enrolled in a boarding school. The father was assigned to work alone, and his life changed in a hurry, and Seiji and Reika began to live with two mothers and children. The house, which was lively, suddenly became quiet, and Reika felt a sense of loss. Seeing such a mother, Seiji felt frustrated and empty, and tried to regain his mother's affection, which he could not monopolize until now.