Yuji was born as the second son in a family of three brothers. His mother, Momoko, had the impression that he was a quiet and unassertive child, but… One spring, the older brother went to work and lived alone, while the younger brother went to boarding school to continue playing baseball. His father moved away from home and his life changed in a hurry, Yuji and Momoko started living with their mother and child. Momoko feels lost when the bustling house suddenly becomes quiet. Seeing his mother like that, Yuji felt disappointed and empty, he tried to win back his mother's love, which he could not monopolize until now.