Kenji is the second son of three brothers. His mother, Aoi, was a child who didn't require much care… But one spring, his older brother found a job and started living alone, while his younger brother went to boarding school. His father became busy taking up a new post alone, and Kenji and Aoi began living together. The once lively home suddenly became quiet, and Aoi felt lost… Faced with this mother, Kenji felt regret and emptiness, because his mother always only cared about his brothers, so he wanted to monopolize his mother's love…