Back in the ancient time, people in one secluded village developed super human ability from a supernatural phenomenon. In order to gain more super human abilities, they must use their power to do good. A descendant from this guardian tribe treats good deeds like a list of things to do. He, then, meets a woman who can accelerate fulfilling his good deed quota and move him up from a trainee guardian to a real guardian angel. They end up living together as roommates as he helps her succeed at work and in love. That is, until he is captured by a mad scientist who wants to do all kind of experiments on him.