Born as the second son of a family with three brothers, Kenji was raised by his mother, Fuyuka, to be a well-behaved and low-maintenance child. However, one spring, everything changed—his older brother moved to Tokyo for work and began living independently, his younger brother went to the city on a sports scholarship, and their father started living separately due to a work transfer. With the family suddenly scattered, Kenji and Fuyuka were left alone together in the quiet family home. The once lively household fell silent, and Fuyuka became overwhelmed by loneliness and a deep sense of loss. Meanwhile, Kenji grew increasingly frustrated, feeling that his mother, who had always doted on his siblings, never gave him the attention he desired. As he became acutely aware of the maternal affection he had never fully possessed, hidden emotions and inner conflicts began to surface between mother and son.