Kenji was born as the second son of three brothers. His mother, Toko, had the impression that he was an easy child to take care of, but... One spring, the older brother got a job and started living on his own, while the younger brother entered a boarding school. Their father was transferred away from his family, and their lives changed drastically, leaving Kenji and Toko to live alone. The once lively house suddenly became quiet, and Toko felt a sense of loss... Seeing his mother like that, Kenji felt frustrated and empty at only worrying about his siblings, and he wanted to feel his mother's love in his own body...