Yuji was born as the second son of three brothers. His mother Momoko had the impression that he was a quiet child who didn't assert himself... But one spring, his older brother got a job and lived alone, while his younger brother entered a boarding school to study baseball. Their father moved away from his family and Yuji and Momoko began living together as mother and son. The lively house suddenly became quiet, and Momoko felt a sense of loss. Seeing his mother like that, Yuji felt regret and emptiness, and tried to get back the love of his mother that he had never had the chance to monopolize...