Yuzuki is the second son of three brothers, and to his mother Yuka, he was always the child who required less attention. However, one spring, his older brother began living alone after landing a job, and his younger brother entered a boarding school. Around the same time, their father was transferred for work, leaving the house suddenly quiet. Yuka began to feel loneliness and a sense of loss. Seeing his mother's state, Yuzuki resolves to reclaim the maternal affection he never fully had. With the family structure drastically changed, life begins anew with just Yuzuki and Yuka under one roof. Amid the quiet days in their now-silent home, a new kind of bond begins to grow between mother and son.