Yuji was born as the second son of three brothers. His mother, Saki, had the impression that he was quiet and shy, but... One spring, his older brother got a job and lived alone, while his younger brother entered a boarding school. Their father moved away from his family, and their lives changed drastically, leaving Yuji and Saki to live alone. The lively house became quiet, and Saki felt a sense of loss... Seeing his mother like that, Yuji felt frustrated and empty for only caring about his siblings, and he tried to receive all of his mother's love...