Kenji, the second son of three brothers. To his mother, Rina, he seemed like a quiet child who didn't assert himself... One spring, his older brother got a job and moved out, while his younger brother went to a boarding school for baseball. His father was also on a business trip alone, and suddenly Kenji's life changed drastically as he started living with just his mother. The once bustling home became quiet, and Rina felt a sense of loss. Seeing his mother like this, Kenji felt bitterness and emptiness, trying to regain the maternal love he had never fully possessed...
