Rein was only 17 years old at that time. He got caught up with an evil organisation and got busy with getting rid of them with her two lovers Stella and Tasha. While going after this organisation with a very deep root, they found themselves in a small nation called Ucarioka.
Ucarioka was not an important nation by any means. But it was quite a remote and desolate nation with most of it filled with empty grassland. For that reason, the evil organisation had found this place to be extremely suitable to act as their hidden headquarters.
But the main reason why this place was their hidden headquarters was because the big sister of the leader of this organisation was living here with an extremely valuable item which was given to her by her father. The leader wanted to get his hands on this item for a long time, but a fate type spell cast by his father was preventing him from getting it as trying to get it by force would just destroy the item.