Kenji, the second son of three brothers, was always seen by his mother, Megumi, as a child who didn't need special care. However, one spring, his older brother started working and lived alone, while his younger brother went to a boarding school. Their father took up his post alone, and life suddenly became quiet, causing Megumi to feel lost… Seeing her mother's state, Kenji felt remorse and emptiness, and decided to fight for the love he had always been unable to have exclusively from his mother…