Kenji was born as the second son of three brothers. From his mother, Natsuko's point of view, he was an easy-going child, but... One spring, his older brother got a job and lived alone, while his younger brother entered a boarding school. His father was sent away from home and his life changed in a hurry, and Kenji and Natsuko's mother and child began to live together. The lively house suddenly becomes quiet, and Natsuko feels a sense of loss... Seeing her mother like that, Kenji feels frustration and emptiness, and tries to regain his mother's love, which he couldn't monopolize until now.