Yuzuru was born as the second son of three brothers. From my mother, Yuka, I had the impression that she was a child who couldn't handle it ... One spring, my brother got a job and lived alone, and his younger brother entered a dormitory school. His father was assigned to work alone and his life changed in a hurry, and Yuka and Yuka's mother and child began to live together. The bustling house suddenly became quiet and Yuka felt a sense of loss ... Seeing her mother, Yuzuru felt regret and emptiness, and tried to regain her mother's affection, which she couldn't monopolize until now.