Amber Light.

Hironaga Ryota was a child when he was separated from his father due to his parents' divorce. He takes over the glasswork factory his father almost brought to bankrupty and manages to somehow get by. In the meantime, Ryota himself is also divorced with children he does not see. One day his older brother Shoichi says he saw their father out in the city. Thus begins the two brothers' effort to find their father.