Transferred to Osaka, the daughter and her husband moved away, leaving grandmother and grandson to live together. As the grandson grew strong and healthy, now past twenty yet still youthful, the grandmother began seeing echoes of her late husband in him. Though their days were happy enough, her needs as a woman went unfulfilled. Amid their quiet life, hidden emotions slowly emerged between them, weaving an intimate bond across generations. This is the story of a forbidden relationship between grandmother and grandson.