Yuzuru was born as the second son of three brothers. From her mother, Yuka, she 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 Yuzuru and Yuka began to live with two mothers and children. The house, which was lively, suddenly became quiet, and Yuka felt a sense of loss. Seeing such a mother, Yuzuru felt frustrated and empty, and tried to regain her mother's love, which she could not monopolize until now.