Kenji, the second son among three brothers, was seen by his mother Saki as the most self-sufficient child. One spring, his older brother moved out for work, his younger brother entered a boarding school, and his father was transferred to a different city for work. Suddenly, the once lively home became quiet, leaving Kenji and Saki living alone. Feeling a sense of loss, Kenji, who had always felt overlooked compared to his brothers, sought to monopolize his mother’s affection…