Kenji was born as the second son of three brothers. His mother, Rina, 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 their lives changed drastically, leaving Kenji and Rina to live alone with their mother. The lively house suddenly became quiet, and Rina a sense of loss. Seeing his mother like that, Kenji felt regret and emptiness, and tried to get back the love of his mother that he had never had all to himself...