Kenji was born as the second son of three brothers. From his mother Reiko's perspective, he seemed quiet and withdrawn... One spring, his older brother got a job and lived alone, and his younger brother enrolled in a boarding school. Kenji and Reiko started living together due to a sudden change in their father's life as he moved away from home. The lively house becomes quiet and Reiko feels a sense of loss... Seeing his mother in such a state, Kenji feels the regret and emptiness of worrying only about his brother, and tries to feel his mother's love for him.