After divorcing her husband, Nanako raised her two sons alone. To her, her sons were irreplaceable treasures. One day, to comfort her younger son Jiro, who had just fought with his older brother Taro, Nanako gently embraced him. Suddenly, after stopping his tears, Jiro looked up at her with shy yet serious eyes and boldly asked, "Mom, can I suck your breasts?" Unable to suppress her deep affection for her son, Nanako gave in to his request. In that moment, a new bond was born between Nanako and Jiro.