“Space is wonderful.” A dull, middle-aged salaryman trapped in a bleak corporate life had never known much happiness. One day, however, he saves a young girl who is about to jump in front of a train and loses his life in her place. As his consciousness fades, he feels relieved that, at least in the end, his death had meaning. When he awakens once more, it is on a planet far removed from Earth, in a world inhabited by an angel-like race! This civilization possesses technology where advanced magic and science are seamlessly intertwined. Yet, having grown isolated in order to escape the threats of space, the planet has begun a slow march toward extinction. “I want to see Earth once again. And I want to save my home as it drifts toward ruin!” This is the story of a girl who journeys across the vast galaxy, interacting with Earth, confronting its problems, and embarking on grand adventures through space.