Yuji was the second son in a family of three brothers, and from his mother Saki's perspective, he had always been quiet and reserved. Everything changed one spring when his older brother moved out for work, and his younger brother began attending a boarding school. Meanwhile, their father was transferred for work and left home, leaving Yuji and Saki to live together alone. The once lively household grew silent, and Saki found herself overwhelmed with loneliness and a sense of loss. Seeing his mother this way, Yuji began to feel regret for having focused so much on his brothers, and he too felt a deep loneliness. Gradually, a desire grew within him—to become the one who would receive his mother's love.