CONQUISTADOR: The Tale of Spirit Hunter

In 22nd century, human world and Spirit world or another dimensional world combined and becoming peaceful and harmony mixed world since 'magnetic-wave quake' incident, apocalyptic phenomenon from space that smashed Earth. Now, human society can interact and adapt comfortable with another alienated species from another world. This mixed society become most advancing human civilization. Edward Freeman, ordinary man that struggling his life as another people do. Early September, when he packing his things to migrate to Scotland, a Spirit named Athena came and claimed that she is Edward's adopted sister after his life was saved from attacked by evil Spirit. Who's Athena? Will Edward's life change totally with presence of his 'adopted' sister?