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. One spring, his older brother got a job and lived alone, while his younger brother enrolled in a boarding school to pursue baseball. Her father moved away from home and her life changed rapidly, and Kenji Torina started living with her mother and son. The lively house suddenly becomes quiet, and I feel a sense of loss. Seeing his mother in such a state, Kenji feels regret and emptiness, and tries to regain her mother's love, which he was unable to monopolize until now.