Yuji was born as the second son of three brothers. His mother, Momoko, gave the impression that he was a quiet child who did not assert himself. One spring, his older brother got a job and lived alone, while his younger brother enrolled in a boarding school to pursue baseball. Their father was transferred to work alone and their lives changed rapidly, and Yuji and Momoko started living as a mother and son. Momoko feels a sense of loss when her lively house suddenly becomes quiet. her mother like that