In the story, the anime and manga has the same concept. He found Ginji and Ban and fed them. Despite of his sickness, he manages to live with his own. After Ginji and Ban introduced themselves in the old man. In the manga, the old begged to bring his daughter back and the Get Backers accepted it right away. In the anime, he begged also but Ban refused. However, Ginji can't take it so he decided to help the old man. While Ban came along since he can't leave Ginji by his own since they are the Get Backers.